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GMC ST 350 1988 Wiring Diagram
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GMC ST 350 1988 Wiring Diagram

GMC ST 350 1988 Wiring Diagram

Gmc st 350 1988 light duty truck
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1988
LIGHT DUTY TRUCK
WIRING DIAGRAM
BOOKLET
ST-350-88

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Summary of Contents for GMC ST 350 1988

  • Page 1 1988 LIGHT DUTY TRUCK WIRING DIAGRAM BOOKLET ST-350-88...
  • Page 3 WIRING DIAGRAMS 2 WIRING DIAGRAMS DESCRIPTION All diagrams in this manual are based on the latest product information at the time of publication approval. The right is reserved to make changes at any time without notice. SUBJECT PAGE COLOR OF WIRE INSULATION WIRE WIRE SIZE...
  • Page 4 WIRING DIAGRAMS 3 WIRING DIAGRAMS 4 - I H M / N V I S 'C C - — N U 9 M 0 S - s c - —1XM/NV1 9 - c e - m a i s s i n - X18/WW B 6C •...
  • Page 5 WIRING DIAGRAMS 5 WIRING DIAGRAMS 6 path. For example the switch controlling the headlights is at the power end of the circuit while the door switch controlling the dom elight completes the ground path. Relays are remotely controlled switches. They are used in high current circuits and in circuits controlled by sensors.
  • Page 6 WIRING DIAGRAMS 7 WIRING DIAGRAMS 8 GROUNDED CIRCUIT (Figure 10) EFE— Early Fuel Evaporation PK— Park A ground circuit is like a short circuit but the current PLR— Puller EGR— Exhaust Gas Recirculation flows directly into a ground circuit that is not part of the ELEC—...
  • Page 7 WIRING DIAGRAMS 9 WIRING DIAGRAMS 10 DIAGNOSTIC TOOLS VOLTS VOLTM ETER S C A LE: 0 V o lts th ro u g h 15 V o lts A = 3 V o lts B = 7 V o lts C = 13 V o lts VOLTMETER (Figures 14 and 15) T he v o ltm e te r (p ro p e rly o b s e rve d ) w ill g ive the...
  • Page 8 WIRING DIAGRAMS 12 WIRING DIAGRAMS 11 W iring harnesses are joined by using a m ultiple plug With the low current and voltage levels found in some WIRE SIZE and receptacle connector block, or a term inal post circuits, it is important that the best possible bond at all CONVERSION TABLE chassis junction block.
  • Page 9 WIRING DIAGRAMS 13 WIRING DIAGRAMS 14 1 2 0 , 1 21 1 2 2 ---------- , 90. Jacket 91. Twisted Wires 92. Splice Clip 93. Crimp and Solder 94. Electrical Tape Wrap 95. Outer Electrical Tape Wrap. B-06230 100. Jacket VIEW A Figure 20—Twisted Wire Repair 101.

  • Page 10: Special Tools

    WIRING DIAGRAMS 15 4. Aluminum /m ylar tape by wrapping and taping. 5. Drain wire with a splice clip (106). Crimp and solder the splice clip. 6. Outer jacket electrical tape wrap (107). SPECIAL TOOLS...
  • Page 11 1988 C/K TRUCK SECTION A PAGE DESCRIPTION PAGE DESCRIPTION POWER DISTRIBUTION (GASOLINE) ELECTRONIC CONTROL MODULE (ECM)-OUTPUTS (DIESEL) POWER DISTRIBUTION (DIESEL) ECM CHART (DIESEL) AUXILIARY BATTERY(RPO TP2) AUTO TRANSMISSION KICKDOWN SOLENOID (M40) FUSE BLOCK HEATER CONVENIENCE CENTER AIR CONDITIONING HEADLAMPS & PARKING LAMPS (BASE) BRAKE WARNING SYSTEM HEADLAMPS &...
  • Page 12 0 3 ; °o; e > r i SPLICE ‘ W < ■ »■-' — M-------- w — ' — X » — < 150-32 BLK 15 0 -8 .0 BLK SHEET METAL REAR FUSE BLOCK SHEET AUXILIARY POWER DISTRIBUTION METAL BATTERY LB4, L03, L05, L19...
  • Page 13 n --------n __n ____ n __ — — REAR FRONT SHEET “ METAL FUSE BLOCK BATTERY BATTERY POWER DISTRIBUTION LH6, LL4 DIESEL SECTION A-PAG E 3...
  • Page 14 -5 0 -2 .0 BRN- JUNCTION BLOCK □ □ a/is □ □ t e D O O C g D O O Cgp □ □ f f l / B □ □ H /E □ □ f il/ll E /E I J0*_J G C i D 0 tCM tGtt...
  • Page 15 5 0 -2 .0 B R N -H E A T E R -A IR CONDITIONING 2-3.0 RED-IGN S W -B A T T 40 .8 ORN/WHT-INTERIOR LPS 3 0 0 -3 .0 ORN —IGNITION 2 4 0 .8 ORN LT SW ITCH-CONV CENTER 2 50 .8 BRN/WHT-REAR WHEEL 4 -3 .0 BRN-IGN S W -A C C ANTILOCK...
  • Page 16 8 .5 GRA 39 .8 PNK/BLK -----CRUISE CONTROL 150 .8 BLK 4 37 .8 BRN 6 0-3.0 ORN/BLK 4 50 -.8 BLK/WHT 38-1.0 DK BLU 40 .8 ORN 38-1.0 DK BLU 1 5 6 .8 WHT TURN 1 5 6 .8 WHT SIGNAL FLASHER 1 50-1.0 BLK...
  • Page 17 FROM ENGINE COOLANT FAN GROUND (L19 ONLY RIGHT HAND HIGH & LOW BEAM HEADLAMPS LEFT HAND HIGH & LOW BEAM HEADLAMP FROM WINDSHIELD WASHER PUMP HEAD LAMPS & PARKING LAMPS (BASE) SECTION A-PAG E 7...
  • Page 19 SIDE MARKER JUNCTION LAMP BLOCK DIESEL RIGHT HAND PARK & TURN SIGNAL LAMPS LEFT HAND PARK & TURN SIGNAL A O ) 0 > LAMPS O iJ SPLICE 9 6 2 9 4 0 1 5 MARKER LAMPS (QUAD ONLY) SIDE MARKER SECTION A -P A G E 9...
  • Page 20 SECTION A-PAG E 10...
  • Page 21 FROM l/P CLUSTER JUNCTION CONNECTOR TERM. BLOCK FROM PANEL 0 6 2 9 4 1 2 6 DIMMER a / ll □ □ SWITCH RIGHT HAND l ~ ? 0 * ~ l ) ~ 3 S * ~ ) 0 Q * »...
  • Page 22 FROM RH HEADLAMP (BASE) >• l/P CLUSTER CONNECTOR GROUND FROM LH HEADLAMP (BASE) HAZARD LAMPS SECTION A-PAG E 12 18 .8 Y E l * ■18 .8 YEL -...
  • Page 23 R.H. TAIL, STOP, TURN L f) FRAME — GROUND 1 2 0 5 9 2 0 0 L.H. TAIL, STOP, TURN CAB-CHASSIS ONLY SIGNAL & BACK UP LAMP HAZARD LAMPS SECTION A -PAG E 13...
  • Page 24 FROM RH HEADLAMP (BASE) » - RH SIDE MARKER " I T LAMP (QUAD) □ □ □ □ l/P CLUSTER D d ~ D O ^ D A X MTU CONNECTOR □ □ a / » □ □ 1 5 1 -2 .0 BLK - - ---- 6294015 O O O d O O FROM ENGINE...
  • Page 25 R.H. TAIL. STOP, TURN 150 .8 BLK > • tf> FRAME GROUND 1 2 0B 920 0 L.H. TAIL, STOP, TURN CAB-CHASSIS ONLY SIGNAL & BACK UP LAMP DIRECTIONAL LAMPS SECTION A-PAG E 15...
  • Page 26 GROUND ■151-2.0 BLK HORN FROM RH PARK 1 "16 & TURN SIGNAL RELAY LAMPS FROM ENGINE COOLANT FAN (LI 9 ONLY) 2 9 -1 .0 DK G R N ------ RIGHT 12 0041 47 HAND 2 9 -1 .0 DK GRN ■ DIRECTIONAL HORN SIGNAL SW...
  • Page 27 G«Q Ci5 Q QsC) D D Q.pQ O O C5 * J O D M J* P A N E L IP S to D D □ GiO D Q QO r r - T T FRONT REAR FUSE BLOCK SHEET AUXILIARY ( Q ) M ETAL...
  • Page 28 O ] ENGINE " — n -------- n — __n ____ n _ — SHEET — METAL FRONT REAR FUSE BLOCK GRD * BATTERY BATTERY START LH6, LL4 DIESEL SECTION A -PAG E 18...
  • Page 29 FROM AIR SWITCH ^ ---------- 4 3 9 -.8 PNK BLK REAR IGNITION LB4, L03, L 05 , LI9 SECTION A -P A G E 19 12020213 120412B6...
  • Page 30 OXYGEN SENSOR 4 3 * 7 7 » 12 0157 91 THROTTLE POSITION TO COOLANT SENSOR 4 5 5 TEMP SENSOR 4 »0 ELECTRONIC SPLICE ■ 4 1 2 -.8 PPL - CONTROL MODULE 45 2 CONNECTORS 4 5 2 .8 BLK - -4 5 2 .8 BLK- 4 1 7 8 DK BLU -4 1 7 .8 OK BLU-...
  • Page 31 CONVENIENCE CENTER 1 2 0 4 7 8 8 6 120 .8 TAN/WHT SPLICE 39 FUEL PUMP TO l/P FUEL IGNITION CLUSTER CONNECTOR GROUND HANDLING 39 .8 PNK/BLK • MODULE 4 5 0 .8 BLK/WHT ELECTRONIC CONTROL MODULE CONNECTORS ------------------------ □...
  • Page 32 FROM A/C COMP (IF EQUIPPED) FROM W/S WIPER MOTOR ■ 150-1.0 BLK - 150 1.0 BLK - FROM FUEL FROM RWAL PRESSURE SWITCH MODULE ENGINE FROM WATER 5 0 9 -2 .0 GRA GROUND IN FUEL 5 0 3 2 .0 GRA SENSOR FROM RH BATTERY ( - ) FUSIBLE LINK...
  • Page 34 COLD l/P CLUSTER ADVANCE CONNECTOR FAST IDLE TEMPERATURE SW ITCH FUEL PRESSURE WATER IN FUEL SENSOR FUEL HEATER 1 2 0 2 0 2 7 4 DIESEL ENGINE CO NTRO LS-LH6 39 .8 PNK/BLK- SECTION A -P A G E 24...
  • Page 35 COLD l/P CLUSTER ADVANCE CONNECTOR CONTROL FUEL PRESSURE WATER IN FUEL SENSOR FUEL HEATER 1 2 0202 74 DIESEL ENGINE CONTROLS —LL4 J 3 9 .8 PNK/BLK - SECTION A -PA G E 25...
  • Page 36 HOT FUEL HANDLING MODULE IDLE AIR CONVENIENCE CONTROL CENTER (L19) IDLE AIR CONTROL STEPPER 4 4 1 MOTOR <S> £ 4 4 2 Pnrn _ 44 3 4 4 4 IDLE AIR CONTROL 12015798 (LB4, L03, L05) FUEL PUMP RELAY 1 2 0 3 3 7 6 8 IN-LINE 4 4 0 1.0 ORN-...
  • Page 37 ':o; ■ JUNCTION □ BLOCK 43 7 □ □ □ □ 4 5 0 2 5 0 4 0 0 w □ □ <e l/P CLUSTER □ FUSIBLE O D 15 □ CONNECTOR □ LINK □ 9> 4 6 6 □...
  • Page 38 SECTION A-PAG E 28...
  • Page 39 THROTTLE POSITION SENSOR OXYGEN SENSOR □ 0 □ 2 5 * S t - i |UkOCS * C MTU □ 0 , r a „ 2 0 A T i l * ftu CTSV U 2 S J ECMIGN M K D O PAM I f □...
  • Page 40 4 4 3 .8 LT GRN/WHT STEPPER MOTOR 4 2 3 - 8 WHT 4 2 3 EST SIGNAL EST REF. PULSE HI 4 3 0 ELECTRONIC < S > \ 4 3 0 .8 PPL/WHT 4 4 2 .8 LT BLU/BLK - 4 2 4 EST BYPASS 44 2...
  • Page 42 CIRCUIT WIRE CIRCUIT WIRE COLOR CAVITY DESCRIPTION DESCRIPTION COLOR CAVITY SIZE SIZE DK GRN/WHT FUEL PUMP RELAY DRIVE NOT USED NOT USED 4 3 6 AIR SWITCH SOLENOID NOT USED 4 4 4 LT GRN/BLK STEPPER COIL B LOW 4 3 5 LT GRN/WHT EGR SOLENOID 4 4 3...
  • Page 43 ENGINE SPEED SENSOR TO ECM COOLANT TEMP SENSOR THROTTLE POSITION SENSOR QsSb A C MTU o ip 0 0 GO T U M p r CT*v DO 0 i f l f t I C N I M tmrt>o TO COLD 0 0 GO ADVANCE RELAY...
  • Page 44 TRANSMISSION CONVERTER CLUTCH COLD ADVANCE SOLENOK) GLOW PLUG INHIBIT RELAY SPLICE COLO «531 ADVANCE 5 3 1 8 LT GRN/BLK - -5 3 1 .8 LT GRN/BLK - CONTROL 9 0 1 -.8 OK GRN- 2 9 7 7 2 5 3 SPLICE 531 4 2 0 -.8 PPL------- 4 3 9 .
  • Page 45 TO ECM 1 2 0 1 5 4 1 0 ELECTRONIC CONTROL M ODULE-OUTPUTS LH6 DIESEL SECTION A -P A G E 35 FUSE BLOCK FRONT SPLICE 4 3 9 REAR...
  • Page 46 CIRCUIT WIRE CIRCUIT WIRE CAVITY DESCRIPTION COLOR CAVITY DESCRIPTION COLOR SIZE SIZE LT GRN MANIFOLD ABSOLUTE PRESS 4 52 SYSTEM RETURN 4 17 DK BLU THROTTLE POSITION SWITCH 4 5 0 SYSTEM GROUND 4 1 0 COOLANT TEMP. SENSOR NOT USED NOT USED NOT USED TORQUE CONVERTER CLUTCH...
  • Page 47 SECTION A -PA G E 37...
  • Page 48 - r — P & 1 .3 6 1 RECTIFIER RESISTOR JUNCTION 7 7 7 ) • 4 4 1 ASSEMBLY 5 1 0 OHM BLOCK .50 WATT FUSIBLE 4 2 * ] 5 LINK • u | . 4 )7 1 7 ..J* 'S S | >...
  • Page 49 HEADLAMPS SWITCH HEATER 8 .5 GRA — LAMP 15 0-.5 BLK 1 2 0 1 0 3 0 9 CONVENIENCE CENTER HEATER 8*.5 GRA LAMP 150 .5 BLK • 1 2 0 1 0 3 0 9 7 2 -2 .0 LT BLU BLOWER 5 0 -2 .0 BRN SWITCH...
  • Page 51 SPLICE CONVENIENCE CENTER TO RADIO BATT. — ---- 2 MODE — ---- 8 DOOR TO BULKHEAD PARK — ---- 9 CONNECTOR MOTOR IGN. — ---- 50 GROUND — ---- 150 — ---- 157 PRESS. SW. A GROUND — ---- 361 WD F/B POT —...
  • Page 52 33 .5 TAN/WHT l/P CLUSTER CONNECTOR REAR WHEEL IN-LINE ANTI­ LOCK DIODE MODULE (POWER CONNECTOR BRAKES 33 .8 TAN/W HT ■ 33- 5 TAN/WHT ■ ONLY) 1 2 0 5 9 1 9 6 >GD 33 -.8 TAN/W HT ■ SPLICE 33 SPLICE 33 MANUAL...
  • Page 53 HEADLAMPS SWITCH ILLUMINATION BATT. HI-BEAM LEFT TURN PARK RIGHT TURN IGN. - 5 0 ALTERNATOR GROUND - 150 FUEL GAGE PRESS. SW. - 157 OIL PRESS A GROUND - 3 6 1 PARK/ANTI-LK M D F/B POT - 3 6 2 ENGINE TEMP + 5 VOLT - 3 6 3...
  • Page 55 — — ILLUMINATION 1 1 — —HI BEAM 14 — -LEFT TURN 15 — -RIG H T TURN 25 — -ALTERNATOR 30 — -FUEL GAGE — -O IL PRESSURE — -PARK/ANTI LK 35 — -ENGINE TEMP 39 — -IGNITION — -L O W COOLANT 150 —...
  • Page 56 CONVENIENCE CENTER FROM l/P CLUSTER SEAT BELT CONNECTOR RETRACTOR FROM PANEL SWITCH DIMMER SWITCH FROM LH JAM B SW FROM HEATER A/C 1 5 0 -3 .0 BLK -1 5 0 -.8 BLK 1 2 0 4 7 6 6 2 FROM RADIO GROUND f r o m c ig a r...
  • Page 57 TRANSFER CASE SPEED SENSOR FOUR WHEEL DRIVE SECTION A -P A G E 47...
  • Page 58 RIGHT HAND JAMB SWITCH LIGHTING PACKAGE RPO 262/YE9 TR9 DOME SPLICE LAMP I_____ I 15 5287 58 ▼ TO LOW COOLANT MODULE (LH6 DIESEL) GROUND LEFT HAND JAMB SWITCH 12047781 DOME LAMP & KEY-IN WARNING BUZZER 159.8 TAN SECTION A-PAG E 48...
  • Page 59 □ □ 5I/TS □ □ □ RIGHT HAND □ JAMB 15 0-.8 BLK - D J B / B □ □ SWITCH 156 .8 WHT a/is E /E □ □ B /IS 12 0477 81 &/TS □ □ □ □ 0 * 0 STOP HAZ ' II...
  • Page 60 PANEL DIMMER SWITCH CONNECTOR °o < 0 CARGO LAMP ■ 9 4 0 .8 ORN/WHT ■ 15 6-.8 WHT - 2 9 7 7 3 7 3 1 2 0 1 5 1 9 9 1 2 0152 71 4 0 . 8 O R N • CONVENIENCE CENTER □...
  • Page 61 FROM PANEL DIMMER SWITCH 20 0 .8 LT GRN (200 FRONT SPEAKER 117 .8 DK GRN - 8 9 0 0 4 4 4 GROUND TO BULKHEAD CONNECTOR TO CONVENIENCE CENTER TO HEADLAMP SWITCH 1 1 8 . 8 GRA ----- TO PANEL 2 0 1 -.8 TAN ----- DIMMER SWITCH...
  • Page 62 REAR SPEAKER FROM l/P CLUSTER FRONT CONNECTOR SPEAKER 8 9 0 0 4 4 4 -2 0 0 .8 LT GRN' -1 1 7 .8 DK GRN TO BULKHEAD CONNECTOR GROUND PARK LP. TO CONVENIENCE DIMMER CENTER POWER ANT IGNITION MEMORY IBATT.I .GROUND .PARK LP.
  • Page 63 FROM PANEL DIMMER SWITCH ► RIGHT 66 7 2.0 BRN ----- 6 67 : ■ O j --------- W IN D O W 6 6 6 : J ~ T 666 2.0 DK BLU FROM LH M OTOR JAMB SW 12 0 0 4 1 4 0 FROM HEATER A/C...
  • Page 64 HEADLAMPS SWITCH GROUND 1 5 0 -3 .0 BLK - CONVENIENCE CENTER ||150|| ------- 1 5 0 -3 .0 BLK - REAR 2 9 7 7 2 5 3 WINDOW 2 9 3 -3 .0 PPL 2 9 7 7 2 5 3 TO LOW COOLANT MODULE (DIESEL) TO l/P CLUSTER...
  • Page 65 FROM l/P CLUSTER RIGHT 2 9 4 -2 .0 TAN . CONNECTOR FROM PANEL LOCK DIMMER 2 9 5 -2 .0 GRA • SWITCH MOTOR 1 2 0 0 4 1 4 0 FROM LH JAMB SW SPLICE 29 5 1 94 1 94 -2 9 5 -2 .0 GRA •...
  • Page 66 w /s WIPER WIPER SW ITC H M OTOR WASHER PUMP GROUND REAR FUSE BLOCK (QUAD) W IP E R /W A S H E R SECTION A -P A G E 56...
  • Page 67 ENGINE l/P CLUSTER CONNECTOR GROUND REDUNDANT CRUISE RELEASE SWITCH REAR FUSE BLOCK CRUISE CONTROL (RPO K34) SECTION A-PAG E 57...
  • Page 68 CLUSTER TO TCC AUTO TRANS CONNECTOR (DIESEL LH6 ONLY) RESISTOR 510 OHM .50 WATT GROUND REAR WHEEL ANTI-LOCK BRAKING SECTION A-PAG E 58...
  • Page 69 BACK-UP LAMP SWITCH (AUTO STOP. TRANS) TAIL LAMP 75'|l 24 III 2973407 STOP. TAIL & TURN SIGNAL LAMP BACK UP LAMP 12059200 - 75 -.8 DK BLU R.H. TAIL, STOP, TURN SIGNAL & BACK UP LAMP SPLICE J 33 2 4 .8 LT GRN 14 I I | 93 15 ||...
  • Page 70 RIGHT HAND BACK-UP -------- 9 .8 BRN — - LAMP ---------18 .8 YEL — ------ - 19 .8 DK GRN ---------2 4 .8 LT GRN -C ZD 1 2 0 1 5 7 9 7 1 2 0 1 0 9 7 4 FOR REMAINDER OF CIRCUITS.
  • Page 71 RH REAR RH FRONT JUNCTION CLEARANCE CLEARANCE BLOCK GATE LAMP END GATE AND CLEARANCE LAMPS 1 2 0 2 0 0 9 9 LH FRONT LH REAR (USED WITH RPO R 05 ONLY) CLEARANCE CLEARANCE SECTION A -PA G E 61 - 9 .8 BRN LAMP LAMP...
  • Page 72 JUNCTION BLOCK DIESEL □ □ E l/E □ □ G C D * C MTU « ( • * ■ □ □ □ CTSY O - - . FUSIBLE LINK " G p - y □ D C C D □ 0 0 0 0 C S 3 0 0 —...
  • Page 73 TO RH SIDE CLEARANCE LPS (R05) R.H. TAIL, STOP, TURN TO LH SIDE SIGNAL & BACK UP LAMP CLEARANCE LPS (R05) 9-.8 BRN FROM RH SIDE CLEARANCE LPS (R05I FROM END GATE LAMPS CONNECTOR GROUND FROM LH SIDE CLEARANCE LPS (R05) —...
  • Page 74 JUNCTION BLOCK DIESEL siru □ □ r » » ~ i C250 FROM RH TAIL, STOP, TURN El/IB □ □ : SIGNAL & BACKUP LAMPS “ O G s O O --. SITE □ □ FUSIBLE Q i C Q g Q 0 FROM RH SIDE LINK CLEARANCE LPS IR05)
  • Page 75 1988 G VAN S E C T I O N P A G E D E S C R I P T I O N P A G E D E S C R I P T I O N POWER DISTRIBUTION (GASOLINE) TRANSMISSION CONVERTER CLUTCH DETENT SOLENOID POWER DISTRIBUTION (DIESEL)
  • Page 77 6 -5 .0 PPL------------------------------ ■ SPLICE 9 0 6 9 0 6 .5 RUST & SIL (LL4I 9 0 6 -5 .0 RED THERMO ILH 6I" 1 2 0 1 5 9 8 2 GLOW PLUG TEMPERATURE TO CLUTCH LAMP CONTROLLER START SWITCH...
  • Page 78 43 .5 YEL-RADIO, AUX. BAT 4 4 -1 .0 DK GRN—LT SW RHEOSTAT 76-3.0 PNK—POWER WINDOWS .5 GRA—INSTR LPS 139-.8 PNK/BLK—IGN (LT3/LL4 & M 40) 50-2.0 B R N -A U X HEATER 39- 8 PNK/BLK—IGN SPLICE 2 40-1.0 O R N -B A T-FU SED HORN/DM 5 0-2.0 B R N -A U X HEATER-A/C 3-3.0 PNK—IGN SW -E N G &...
  • Page 79 RIGHT-HAND CLUSTER CLUSTER HIGH-LOW CONN. CONN. HEADLAMP (GAGE) (TELLTALE) FROM AUX. COOLING FAN IL19 & C60) > • RIGHT-HAND HIGH BEAM HEADLAMP R.H. PARK & DIRECTIONAL LAMP L.H. PARK & DIRECTIONAL LAMP LEFT-HAND HIGH BEAM HEADLAMP LEFT-HAND HIGH-LOW HEADLAMP SHEET ro- METAL HEAD LAMPS &...
  • Page 80 R.H. SIDE MARKER SIDE MARKER GROUND LAMP LAMP 6 2 9 4 0 1 5 6 2 9 4 0 1 5 — l - o ^ o ------- P A R K A 1 2 0 0 4 6 2 8 °...
  • Page 81 G R O U N D R.H. R.H. SIDE MARKER SIDE MARKER LAM P LAM P R.H. PARK & R.H. PARK & DIRECTIONAL DIRECTIONAL LAM P LAM P L.H. PARK & DIRECTIONAL LAM P 6 2 9 4 0 1 5 L.H.
  • Page 82 R.H. SIDE MARKER LAM P CLUSTER CLUSTER CONN. CONN. (TELLTALE) (GAGE) ------ 1 ^ 3 |f]|4 8 9 | ,o . Q D 'G s] E I l n E 3 i l f a D D l i S Q o ] l l [ T ] □...
  • Page 83 CUTAWAY VAN GROUND G30003, E32 ROUTING FOR 2-DOOR CAB VAN G30003 SPLICE RP0-E31, E34, E36, E38 & E39 TO BODY BUILDER WIRING REAR LAMPS 1 2 0 4 5 6 8 9 DIRECTIONAL LAMP - 18-.8 YEL ■ 19-.8 OK GRN 12047781 <...
  • Page 84 SIDE MARKER LAM P FUSE BLOCK CLUSTER CLUSTER CONN. CONN. (TELLTALE) (GAGE) DIRECTIONAL FLASHER R.H. HIGHBEAM HEADLAMP CONN. (DUAL HDLP ONLY) FRONT I_____ 151 -.8 B L K ------ SPLICE 15 8 9 1 7 2 8 0 15-.8 DK B LU - 151-.8 B L K - R.H.
  • Page 85 C U T A W A Y V A N GROUND ROUTING FOR G 3 0 0 0 3 , E32 2-DOOR C AB V A N G 3 0 0 0 3 SPLICE R PO -E31, E 3 4, E 3 6, E 38 & E39 TO BODY BUILDER WIRING...
  • Page 86 HORN • 29 {STEERING COL SWITCHES! 1 2 0 0 4 2 6 7 TO DOME OR TAIL LP CONN. HORN RELAY 240-1.0 ORN ■ > — -2 8 .5 BLK - J------- L 2 9 8 4 1 6 4 1 2 0 0 4 1 4 7 HORN DIRECTIONAL...
  • Page 87 START L B 4 -V 6 , L03, L05, L 1 9 - V 8 FUSE BLOCK SECTION B-PAGE 13...
  • Page 88 SPLICE ■ 3 2 BLK NOT USED -3 3 -. 5 TAN/W HT- WITH GAGES -6 -3 .0 PPL- TO PARK ^ __ BRAKE WARNING SW STARTER MOTOR |«19 SOLENOID CLUSTER | l5 0 | n | l5 0 CONN JU N C TIO N O D p E I 2 .8 RED...
  • Page 89 SPLICE START (8 CYL.) LT9 & N A 5 - V 8 FUSE BLOCK SECTION B-PAGE 15...
  • Page 90 SECTION B-PAGE 16...
  • Page 91 ■ + ■ — — FORWARD REAR BATTERY BATTERY START FUSE BLOCK LL4, LH6 (DIESEL) SECTION B-PAGE 17...
  • Page 92 ■439 .8 PNK/BLK- f— 4 3 9 .8 PNK BLK- - 4 5 3 .8 BLK/RED - - 4 5 3 .8 BLK/RED- -4 3 0 .8 PPL/WHT - — 4 3 0 .8 PPL/WHT ■ - 4 2 3 .8 W H T------- —...
  • Page 93 NOT USED 3 3 .5 TA N /W H T. WITH GAGES . SPLICE — 1 TO PARK © n BRAKE rttn U H H IS E 3 WARNING SW u n m Q H InEH l CLUSTER « CONN. q e j D D n t lL l TO l/P...
  • Page 94 -4 3 9 .8 PNK/BLK - ■439 .8 PNK BLK- I 4 4 0 1 1 [ 4 6 3 1 r ^ M - 4 5 3 .8 BLK/REO - ■ 4 5 3 .8 BLK/RED- □ - 4 3 0 .8 PPL/WHT - —...
  • Page 95 NOT USED 33 .5 TA N /W H T- WITH GAGES . SPLICE TO PARK BRAKE WARNING SW E Z 3U Q 3 CLUSTER CONN. ODUGEJ QDnCE) TO l/P CONN. U d i 8 9 0 5 9 1 7 35 .5 DK GRN ■...
  • Page 96 L i ® 3 39 • ------- — *sym rm+ TO JUNCTION BLOCK FUSE BLOCK IGNITION LT9 & N B2- V8 SECTION B-PAGE 22...
  • Page 97 33 .5 TAN/WHT - — ®C§Hi' NOT USED .4 GRD STRAP SPLICE WITH GAGES ENGINE TO BODY GRN TO PARK QDflE” ! BRAKE CONTROLLER lE E D n F 7 1 WARNING SW CLUSTER 160 n h 5 0 • AIR SWITCH SOLENOID •...
  • Page 98 OXYGEN SENSOR 12 0157 91 THROTTLE POSITION SENSOR -4 1 2 .8 PPL . 4 5 2 .8 BLK- 4 5 2 -.8 BLK - 41 7- 8 DK BLU - 4 1 7 . 8 DK BLU- 4 1 6 .8 GRA -4 1 6 -.8 GRA------ 4 ie 4 6 7 .8 LT.
  • Page 99 FUEL PUMP ASSEMBLY 120-.8 TA N /W H T- ELECTRONIC 1 2 0 4 7 9 4 6 450-.8 BLK/WHT - CONTROL MODULE CONNECTORS 450-.8 BLK/WHT - -{4 5 0 [ 1 E 3 : __ □ 3E 3 EH] * E135 E 3 E E D «G E 3 OGEED...
  • Page 100 GLOW PLUG S-LL4 DIESEL SECTION B-PAGE 26...
  • Page 101 PRODUCTION JU N C TIO N BLOCK GLOW PLUGS-LH 6 DIESEL SECTION B-PAGE 27...
  • Page 102 5 08 4 5 0 i— < ► —f SOLID 1 S T A T E j WATER IN FUEL SENSOR FUEL HEATER FUEL SHUT- OFF VALVE DIESEL ENGINE CONTROLS —LH6 SECTION B-PAGE 28...
  • Page 103 FAST IDLE SOLENOID 1 2 0 0 4 2 6 7 FUEL PRESSURE WATER IN FUEL SENSOR FUEL HEATER FUEL SHUT- DIESEL ENGINE CONTROLS — LL4 OFF VALVE SECTION B-PAGE 29 1 2 0 2 0 2 7 4...
  • Page 105 RIGHT-HAND DIVERT REAR SIDE SOLENOID iE C O I ENGINE 150 . BLK---------------- GROUND 9 3 6 , _____ . ----- 1 936 ) - 9 3 6 .5 YEL— 3 9 .8 PNK/BLK 1 2 0 1 5 7 9 2 SPLICE 9 3 6 ' - 9 3 6 .5 YEL.
  • Page 106 THROTTLE POSITION SENSOR CO O LANT TEMP SENSOR c e r SENSOR E.S.C. HYBRID FUNCTION OXYGEN SENSOR 1 2 0 1 5 7 9 1 AUTO ELECTRONIC CONTROL M O DULE-INPUTS ONLY L B 4 -V 6 ; L03. L05. L 1 9 - V 8 AUTO ONLY SECTION B-PAGE 32...
  • Page 107 ■ 4 3 9 .8 PNK/BLK - • 4 3 9 - 8 PNK/BLK - - 4 4 0 -1 .0 ORN---- - 4 4 0 .8 ORN- - 4 4 0 .8 ORN - -4 4 0 .8 ORN- -4 4 0 .8 ORN- SPLICE 4 4 0 - 4 8 5 .8 BLK...
  • Page 108 ELECTRONIC SPARK TIM IN G E .V .R .V . SOLENOID FOR L 0 5 W/H.D. & L19 ENGINE ONLY SW ITCH SYSTEM GRD SYSTEM GRD FUEL PUMP OIL PRESS SW ITC H ELECTRONIC CONTROL MODULE -O U TP U TS SOLENOID L B 4 -V 6 ;...
  • Page 109 KICKOOWN RELAY ELECTRONIC CONTROL MODULE - OUTPUTS L B 4 -V 6 ; L03, L05, L 1 9 - V 8 SECTION B-PAGE 35...
  • Page 110 CIRCUIT WIRE CIRCUIT! WIRE CAVITY DESCRIPTION COLOR CAVITY DESCRIPTION COLOR SIZE SIZE NOT USED DK GRN/WHT FUEL PUMP RELAY DRIVE 4 6 5 4 3 6 AIR SWITCH SOLENOID NOT USED 4 4 4 LT GRN/BLK STEPPER COIL B LOW NOT USED LT GRN/WHT EGR SOLENOID...
  • Page 111 TO ECM ENGINE SPEED SENSOR COOLANT TEMP SENSOR E L E C T R O N IC C O N T R O L M O D U L E - IN P U T S L H 6 D IESEL SECTION B-PAGE 37...
  • Page 112 > I I NO COLD A D V A N C E GLOW PLUG IN H IBIT RELAY • 5 3 1 .8 LT GRN/BLK - 1 2 0 5 2 2 8 7 COLD I 531 A D V A N C E ■...
  • Page 113 TO ECM ■ 3 9 .8 PNK/BLK E L E C T R O N IC C O N T R O L M O D U L E - O U T P U T S L H 6 D IESEL -4 4 0 .8 ORN SECTION B-PAGE 39...
  • Page 114 CIRCUIT WIRE CIRCUIT WIRE COLOR CAVITY DESCRIPTION COLOR CAVITY DESCRIPTION SIZE SIZE SYSTEM RETURN 4 3 2 LT GRN MANIFOLD ABSOLUTE PRESS. 4 5 2 THROTTLE POSITION SWITCH 4 5 0 SYSTEM GROUND 4 1 7 DK BLU COOLANT TEMP. SENSOR NOT USED 4 1 0 NOT USED...
  • Page 115 FROM RH HEADLAMP(S) TO EGR SOLENOID TO TRANS ' SHEET KICKDOWN D C [M ] TO HOT FUEL RELAY METAL CHAMK CHORC'FUEl PUMP (M 40) -► HANDLING GROUND MODULE a> TO AIR SW ■ FRONT SPLICE 39 FUSE BLOCK TO ALT ' 7 0 2 2 .0 BLK/RED ENGINE 1 2 0 1 5 7 9 2...
  • Page 116 TO KICKDOWN AUTOMATIC SOL. (M 40 ONLY) ONLY 42 2 .8 TAN/BLK • - 4 2 2 .8 TAN/BLK- -4 2 2 -.8 TAN/BLK - SPLICE 4 2 2 • 4 2 2 .8 TAN/BLK ■ 4 2 2 .8 TAN/BLK- •...
  • Page 117 KICKDOW N RELAY TR AN SM ISSIO N KICKDOW N SOLENOID TRANSM ISSION KICKDOW N SOLENOID FOR LT9 ONLY LT9 ONLY — 55-.8 O R N --------- — IN 56 AUTO TRANSMISSION KICKDOWN SOLENOID (M 40) LT9 ONLY SECTION B-PAGE 43...
  • Page 118 SHEET M ETAL GROUND BLOWER SW ITCH HI BLOWER RELAY JU N CTIO N A /C TEMPERATURE BLOCK AIR CONDITIONING (RPO C60) SW ITCH L19 ENGINE SECTION B-PAGE 44 ONLY...
  • Page 119 ■ 851 8 9 0 0 4 2 0 REAR 1852 BLOWER & ' ° ” 2 9 7 7 2 5 3 REAR A/C SWITCH REAR BLOWER RESISTOR GROMMET 1 2 0 0 4 7 5 2 -1 0 7 2 -2 .0 BLU/BLK- ■...
  • Page 120 HEATER BLOWER SW ITC H GROUND 1 2 00 4 0 6 7 BLOWER MOTOR £ c ? . 2 9 8 4 6 0 9 N < M r» io in 1 2 0 1 5 9 5 2 1 2 0 1 5 9 8 7 RESISTOR BLOCK...
  • Page 121 50-3.0 BRN 50-3.0 BRN FEED THRU CAPACITOR SHEET M ETAL GROUND ■150 .8 BLK* REAR A U X ILIA R Y HEATER BLOWER M OTOR 50 3.0 BRN/WHT - 952-3.0 WHT----- > - 2984092 8905426 2973422 REAR BLOWER & REAR A /C SW ITCH 72-2.0 LT BLU 72-2.0 LT BLU-...
  • Page 122 CLUSTER CLUSTER CONN. CONN. (TELLTALE) (GAGE) f s S 33 |f||489 LH6/LL4 □ D n [I® 3 ONLY □ D l l ® □EJUCZ] E E ° ] DZlnCEl □nGOO ^ 1 .ii— 1 .1 . ■ I c r f a I 1 5 0 | ~ | l 5 0 | LB4/L03 L05/LI9...
  • Page 123 - 3 9 . 8 PNK/BLK - PARK BRAKE W ARNING SW ITCH BRAKE SET 12 0042 67 ( ° Z JAU X 1 2 0042 67 ■ = B C D @ 0 TO l/P HARNESS • 3 3 . 8 TAN/WHT - PARKING BRAKE 0 0 0 E 1^...
  • Page 124 -4 3 .8 YEL INSTRUMENT PANEL LAMPS (TELLTALE) SECTION B-PAGE 50...
  • Page 125 ILLUM ILLUM ILLUM ILLUM ILLUM INSTRUMENT PANEL LAMPS (GAGE) SECTION B-PAGE 51 - 43 .8 YEL...
  • Page 126 39 .8 PNK/BLK • D s G 1 M I f c 3 E 3 CMMK CHOU'VUCl I r a p g g a g _____ m&L. SPLICE FRONT DEAR FUSE BLOCK 39 .8 PNK/BLK 3 0 .8 PNK TO BRAKE SW SPLICE 39 TCC (AUTOI TO VSS...
  • Page 127 ILLUM ILLUM ILLUM ILLUM ILLUM ILLUM I 3 3 | IH 181i3 0 i |l6 0 |1 |1 6 0 | . 150 .8 BLK . 1 1 6 1 J |3 9 | 39 .8 PNK/BLK . 39 .8 PNK/BLK 3 0 -.5 PNK------- - 1 5 0 .8 BLK - 39 .8 PNK/BLK -...
  • Page 129 ILLUM ILLUM ILLUM ILLUM ILLUM HEATER CONTROL LAMP ► AUD. ALARM CENTER BUS BAR GROUND 1 2 0 2 0 8 2 7 C 1 5 0 J (T io ) 1 ( T io 1 2 0 2 0 8 2 9 FUEL 150-1.0 BLK ■...
  • Page 130 C O O LAN T TEMPERATURE LB4. L0 3. L05. L19. LT9 CO O LANT TEMPERATURE LL4. LH6 PRESSURE SENDER LB4, L0 3. L05, L19. LH6, LL4 W ATER IN FUEL SENSOR I-------— 1 ► —h O ^ > 0 - + LL4, LH6 SOLID L i L Al EJ...
  • Page 131 IGNITION SW ITCH IN D IC A T O R L A M P S (T E L L T A L E ) S E C T IO N B-PAGE 5 7...
  • Page 132 LIGHTS ON IGNITION - 3 9 IGN. KEY BUZZER - 8 0 BATTERY - 1 4 0 GROUND - 1 5 0 FASTEN BELTS - 2 3 7 SEAT BELT SW. - 238 PRESSURE SW ITCH 1 2 0 0 4 2 7 5 ----------2 4 1 .8 B R N /W H T---------- ---------- 931- 8 DK BLU ------- 1 26...
  • Page 133 IGNITION SW ITCH - ± - INDICATOR LAMPS (GAGE) 8 9 1 7 6 9 3 SECTION B-PAGE 59...
  • Page 134 JS3T RIGHT-HAND DOOR J A M B (B O B C D Q 1 5 0 3 B »,c SW ITCH (S O B B B E E B -E S Q D >< IB IB C D m IB ID E 2 9 8 4 3 6 9 2977107 •ATT...
  • Page 135 2 9 7 3 3 2 4 6 2 8 8 8 7 2 RIGHT H AN D TERM SLIDING DOOR RH STEPWELL LAM P J A M B SW ITCH ■156 .8 W H T ■ -1 5 6 -.8 WHT ■ 1156J -1 5 6 .8 WHT •...
  • Page 136 8 9 0 0 4 4 4 RIGHT REAR SPEAKER 8 9 0 0 4 4 4 LEFT REAR SPEAKER 8 9 0520 6 8 9 0 5 2 2 0 RADIO EQUIPMENT (RPO UM2, UM3, U58) SECTION B-PAGE 62...
  • Page 137 r> -2 0 1 -.8 TAN - 118- 8 GRA • 1 1 7 -8 DK GRN - 2 0 0 .8 LT GRN 1 2 0 0 4 8 8 7 • 8- 8 GRA- -8 - 8 GRA ------- - 4 3 .8 YEL - - 43- 8 Y E L - ------------ [...
  • Page 138 39 .5 PNK/BLK SEAT BELT RETRACTOR SW ITC H SEAT BELT LIGHTS ON BUZZER IGNITION & TIMER IGN. KEY BUZZER BATTERY 15 0-.8 8LK ■ GROUND 150 .8 BLK - FASTEN BELTS 6 2 9 4 0 5 1 SEAT BELT SW. 2 3 8 .8 BLK/WHT ■...
  • Page 139 c ir c u it 16 7-2.OTAN 167-2.0 TAN 2 I BREAKER 66 6 -2 .0 DK BLU . 166 2.0 DK BLU/WHT 166 2.0 DK BLU/WHT E H } ■ j r - © 3 - 1 76-2.0 PNK - 76 -2.0 PNK 1 2 0 0 4 1 4 0 66 7 -2 .0 BRN...
  • Page 140 CIRCUIT BRKR □ [ c i r c u i t |2 9 4 |BREAKER 29 4 .8 TAN — j 294 | • 2 9 5 -1 .0 GRA 12941- 2 9 4 .8 TAN ■ 2 9 4 -1 .0 TAN 29 5 .8 GRA —...
  • Page 141 POWER DOOR LOCKS W IT H D ELA Y M O D U LE (RPO A U 3 ) SECTION B-PAGE 67 60-1.0 ORN/BLK...
  • Page 142 WINDSHIELD WIPER MOTOR in i is m is (5 i 0 ffl E 8 9 1 7 5 4 8 8 9 1 7 5 4 4 m E 31 ACC I K WIPER 25 AMP IM 9 WE IkS §/fi B a d n c g i ' i/I fes E3 “...
  • Page 143 W INDSHIELD WIPER MOTOR JAUK ( H I 0 S I E E @ 0 C D 0 E E 0 [D 0 S 0 0 8 9 1 7 5 4 8 8 9 1 7 5 4 4 0 0 0 E E •6* SH U N T...
  • Page 144 SECTION B-PAGE 70...
  • Page 145 3 98 LH6. LL4. LT9 (AUTO ONLY) VENT V IV | 4 3 7 I LL4, LT9 (MAN ONLY) *— ■ - ----- 1 LB4. L0 3. L0 5. LI9 (AUTO ONLY) V IV CRUISE CONTROL MODULE CRUISE SERVO 4 0 3 - - CRUISE VENT VALVE 4 0 2 - * CRUISE CONTROL VAC 4 0 0 /4 3 7 - -...
  • Page 146 SIDE • 150 .8 BLK • MARKER LAMP GROUND TAIL, STOP & SPLICE 150 DIR. LAMP R.H. BACKUP LAMP 12047781 24 .5 LT GRN JOX- 1 2 0 1 0 8 0 4 1 2 0 4 7 7 B 2 5 08 | 75 | ■I2 4 94 | 93 |...
  • Page 147 CUTAW AY VAN RIGHT HAND G 3 0 0 0 3 , E32 BACK-UP i E 0 @ IS E 0 SPLICE LAMP TO BODY BUILDER IS H ) C D 0 ® C D B WIRING REAR LAMPS B E 0 Q 0 I D 0 •A TT A C C IP S n —n n —n p—n...
  • Page 148 H E A D LA M P SW ITC H R.H. TAIL, STOP. & DIRECTIONAL S S E B E E ® * ^ LAMP 1 2 0 0 4 6 2 8 dl (B E B IS E ® w °...
  • Page 149 R.H. SIDE MARKER LAMP H EAD LAM P SW ITCH R.H. PARK & DIRECTIONAL LAM P 9 .8 BRN (3 5) E B E E E 12 0 0 4 6 2 8 E E m m 0 E E \°...
  • Page 150 HEADLAMP SWITCH E f i S 0 E E B 1 2 0 0 4 6 2 8 ® B B S W D O E E H I H I E E IB •ATT SHUNT SHUNT B t i n w w n r c ^ [ S I [ M l...
  • Page 151 R.H. SIDE MARKER LAMP H EA D LAM P SW ITCH JA U I M TU RIGHT HAND TAIL. STOP & ® DIRECTIONAL E E [D H 0 E E 1 2 0 0 4 6 2 8 LAMP E E 0 E E E E LICENSE I ACC [ M l...
  • Page 152 JUNCTION BLOCK 3 0 AMP FUSE . 2 -5 .0 RED- STj2 - V ( § > 3 - 9 4 8 3 3 4 4 7 -3 .0 DK BLU WIRE TO RH TAIL, STOP, DIR „ SIG, MARKER 4 7 3 .0 DK BLU •...
  • Page 153 1988 S/T TRUCK SECTION C DESCRIPTION PAGE PAGE DESCRIPTION FOUR-WHEEL DRIVE INDICATOR POWER DISTRIBUTION (LL2) POWER DISTRIBUTION (LN8, LB4) AIR CONDITIONING (4 CYL.) FUSE BLOCK DETAIL AIR CONDITIONING (6 CYL.) LL2, LB4 HEAD LAMPS & PARKING LAMPS HEATER MARKER LAMPS BRAKE WARNING SYSTEM HAZARD LAMPS INSTRUMENT PANEL LAMPS (TELLTALE VERSION)
  • Page 154 3 0 0 -3 .0 ORN* AUTO ONLY TO CLUTCH -5 -3 .0 YEL START SWITCH TEMPERATURE LAMP OR GAUGE ONLY TO BRAKE WARNING SYSTEM 8 0 6 4 4 0 « 9 0 0 © 4 3 9 1 9 1 I s "...
  • Page 155 3 0 0 -3 .0 ORN - TEMPERATURE LAMP OR GAUGE TO BRAKE WARNING SYSTEM FUSE BLOCK POW ER D ISTR IBU TIO N (L N 8 , LB 4) SECTION C-PAGE 3...
  • Page 156 POWER CIRCUIT 76 30 AMP CIRC BREAKER IGN/ACC POWER WINDOWS - -4 WHEEL DRIVE -TACH - ISRV MIRROR MAP LIGHT IGNITION- 3 9 / 2 0 AMP PNL. LPS—8/5 AMP AUTO TRANS­ CRUISE CONTROL- REAR DEFOGGER LAMP ASHTRAY LAMP REAR DEFOGGER TIMER/RELAY- CLOCK DIM 4 3 .
  • Page 157 RIGHT HAND TO R.H. HEAD LAMP SIDE MARKER LAMP SHEET METAL TO L.H. GROUND SIDE MARKER LAMP TO TAIL RR MARKER HEADLAMPS & PARKING LAMPS & LICENSE LPS SECTION C-PAGE 5...
  • Page 158 R.H. R.H. SIDE MARKER SIDE MARKER TO l/P FRAME LAM P COURT. LAM P LAMPS GROUND SPLICE 9 HEAD. PANEL & DOME -9 .8 BRN 12 0340 61 -► TAIL STOP LAM PS SW ITCH & DIRECTIONAL LAMP SPLICE 12020397 G R O M M ET .
  • Page 159 R.H. R.H. SIDE MARKER SIDE MARKER HEAD, PANEL & DOME LAMP LAMP LAMPS SWITCH 6 2 9 4 0 1 5 TO l/P CTSY LAMPS u > TAIL STOP TO l/P & DIRECTIONAL S P U C E J j5 ^ » - ■...
  • Page 160 SIDE MARKER LAMP 62 9 4 0 1 5 i > i i 4 o » r i n E IS e g B E E > E CONVENIENCE 1 2 0 3 4 3 7 2 [ ^ 1 5 0 8 2 3 7 ^ CENTER SI 0 E H E E E...
  • Page 161 l/P CLUSTER l/P CLUSTER CONN CONN R.H. (TELLTALE) (GAGES) T A IL , STOP, & DIRECTIONAL 8 9 1 7 9 6 2 LAM P R.H. SIDE MARKER 19 .8 DK GRN . LAMP 4 1 9 1 39" | 237 15 0 .8 BLK f "...
  • Page 162 CONVENIENCE R.H. CENTER SIDE MARKER LAM P 6 2 9 4 0 1 5 § B IS 1 1 1 1 * ( ® h FUSE BLOCK 9 B 1 HI I H EA D LAM P CONN ® h a 0 ® e 1 5 1 .8 BLK- .
  • Page 163 R.H. TAIL. STOP, & DIRECTIONAL 8 9 1 7 9 6 2 l/P CLUSTER LAM P l/P CLUSTER R.H. CONN SIDE MARKER CONN LAMP (GAGES) 19 8 DK GRN • 150 .8 BLK -2 7 .8 BRN - 17 .8 WHT STOP LAM P SWITCH SPLICE...
  • Page 164 R.H. □ SIDE MARKER E) (3 a 0 0 El □ LAMP FUSE BLOCK ‘ 0 I S 8 0 6 2 9 4 0 1 6 0 B 0 @ 1 P W R R.H. V & T 1 / f i HEADLAMP pw p CONN...
  • Page 165 R.H. T A IL, STOP, & l/P CLUSTER l/P CLUSTER DIRECTIONAL 8 9 1 7 9 6 2 CONN CONN LAM P (TELLTALE) (GAGES) R.H. SIDE MARKER 19 8 DK GRN . LAMP 150 .8 BLK GROM MET 2 9 8 9 5 7 6 15 5 DK BLU ____ I .1 6 8 PPL -----...
  • Page 166 R.H. •ATT SIDE MARKER G ) (B B B LAM P is 1 FUSE BLOCK E) B E ) S B O B S H B O IS ) E S IS 8) IB IS ■ 15 1-.8 BLK- I 2SA I DIRECTIONAL ---- 15 1-.8 BLK- FLASHER...
  • Page 167 R.H. T A IL, STOP, & DIRECTIONAL 8 9 1 7 9 6 2 LAM P l/P CLUSTER R.H. SIDE MARKER CONN LAMP (GAGES) 19 8 DK GRN - 150 .8 BLK BACK UP SPLICE LAMP ; LICENSE LAMP 19 .8 DK GRN 18 .8 YEL ■...
  • Page 168 CONVENIENCE CENTER 8 U Z Z E R c n r ^ i r ^ i i | 2 3 8 || 1 g 0 || 2 3 7 1| 3 9 | S C A T KIT S W ’ - 238 0R 0U N 0 —150 H O M U...
  • Page 171 _ n --------- n _ BATTERY START (6 CYL.) LL2 FRONT REAR FUSE BLOCK SECTION C-PAGE 19...
  • Page 173 CONVENIENCE CENTER REAR FRONT IGNITION (4 CYL.) FUSE BLOCK SECTION C-PAGE 21...
  • Page 174 GROMMET 1 2 0 5 9 4 4 0 - 4 3 9 .8 PNK/BLK - - 4 3 9 .8 PNK/BLK- * E 8 T • -0423 - 4 5 3 .8 HED/BLK- -4 5 3 .8 RED/BLK- W IT R E F — -Q 430 -4 3 0 -.5 PPL/WHT - -4 3 0 .5 PPL/WHT -...
  • Page 175 l/P CLUSTER CONN (GAGES) CONVENIENCE CENTER < TO TCC BRK SW HOJlN f e lA Y (AUTO ONLY) BUZZER )E *3 D “ L i n -3 9 .8 PNK/BLK • BELTS + • 237 IGNITION -3 0 0 -3 .0 ORN- ION KEY SW X .
  • Page 176 GROM MET 1 2 0 5 9 4 4 0 <*440 -4 3 9 - 8 PNK/BLK - -4 3 9 - 8 PNK/BLK - -4 5 3 .8 BLK/RED < - 4 5 3 - 8 BLK/RED - - 4 3 0 .5 PPL/WHT- - 4 3 0 .5 PPL/WHT - •...
  • Page 177 REAR FRONT IGNITION (6 CYL.) LB4 FUSE BLOCK SECTION C-PAGE 25...
  • Page 178 GROMMET 1 2 0 5 9 4 4 0 -4 1 2 .8 PPL - 4 1 7 .8 DK BLU -4 1 7 -.8 DK BLU SPLICE 4 5 2 ELECTRONIC -4 5 2 -.8 BLK -4 5 2 -.8 BLK' CONTROL MODULE THROTTLE - 4 1 6 - 8 GRA...
  • Page 179 439- 8 PNK/BLK OXYGEN SENSOR GROM MET 12015791 1 2 0 5 9 4 4 0 - 4 1 2 . 5 PPL - -4 1 2 - 5 PPL - 4 1 7 -.5 DK BLU- -4 1 7 - 5 DK BLU ELECTRONIC -4 5 2 - 5 B LK ------ -4 5 2 - 5 BLK...
  • Page 180 IDLE AIR CONTROL ! TO ECM OXYGEN SENSOR GROUND FUEL PUMP RELAY 1 2 0 2 0 0 1 5 PRESSURE SW ITC H FUEL PUMP PRIME F U E L C O N T R O L CLUSTER l/P CLUSTER 1 2 0 1 5 1 3 3 1 2 0 1 6 1 3 3 &...
  • Page 182 IDLE AIR C O N T R O L - IN J. AC TU ATO R 1 2 0 1 5 2 9 4 TO ECM OXYGEN SENSOR GROUND FUEL PUMP RELAY 1 2 0 2 0 0 1 5 PRESSURE SW ITCH FUEL...
  • Page 183 l/P CLUSTER l/P CLUSTER CONN CONN (TELLTALE) (GAGES) -1 2 0 -1 .0 T A N - FUEL PUMP & SENSOR ENGINE 8 0 6 » 2 • 4 , 4 I • 3 4 8 6 4 4 0 9 0 0 ■J I .
  • Page 184 THROTTLE 452 .8 BLK POSITION SENSOR C O O LAN T TEM P SENSOR M AN IFO LD ABSOLUTE TEMPERATURE OXYGEN SENSOR POWER STEERING AN TIC IPATE SW ITC H TO SPLICE 4 3 9 (LN8 -4 CYL.) ELECTRONIC CONTROL M O DULE-INPUTS SECTION C-PAGE 32...
  • Page 185 452- 8 BLK 452 .8 BLK TO ECM (LN8-4 CYL.) ELECTRONIC CONTROL MODULE INPUTS SECTION C -P A G E 33...
  • Page 186 IDLE AIR TRANSMISSION ELECTRONIC CONTROL CONVERTER SPARK CLUTCH TIMING SOLENOID I.S .T. MONAL E.S.T. IV P A M '424 I.t.T . DCF. P U LM HI E.C.T. REF. PU LW 10 -413 12 0 2 0 S 3 2 120-1.0 TAN/WHT 1 2 0 4 0 7 5 4 4 2 0 -.8 PPL ----------- 4 2 2 .8 TAN/BLK —...
  • Page 187 TO ECM 120 1.0 TAN/WHT (LN8-4 CYL.) ELECTRONIC CONTROL M O D U LE - OUTPUTS SECTION C-PAGE 35 30-.8 PNK-...
  • Page 188 SECTION C-PAGE 36...
  • Page 189 CIRCUIT CIRCUIT WIRE WIRE COLOR CAVITY DESCRIPTION COLOR CAVITY DESCRIPTION SIZE SIZE DK GRN/WHT FUEL PUMP RELAY DRIVE NOT USED 4 6 5 NOT USED # 4 2 2 TAN/BLK TORQUE CONVERTER CLUTCH STEPPER COIL B LOW # 4 5 6 TAN/BLK UPSHIFT M A N -O N L Y 4 4 4...
  • Page 190 M AN IFO LD THROTTLE -4 4 0 -1 .0 ORN- ABSOLUTE POSITION PRESSURE SENSOR SENSOR - 4 5 2 .5 BLK - 4 3 9 .8 PNK/BLK- ►-4 1 7. — 4 1 7 .5 DK BLU — 4 ■ 6 4 1 6 .5 GRA 1 2 0 6 5 2 8 7 -4 5 0 -.8 BLK/WHT -...
  • Page 191 TO ECM (LL2-6 CYL.) ELECTRONIC CONTROL MODULE (EC M )-IN PU TS SECTION C-PAGE 39 439 .8 PNK/BLK- -439 .8 PNK/BLK...
  • Page 192 TRANSMISSION E.V.R.V. CONVERTER 1 2 0 4 7 9 6 0 SOLENOID CLUTCH SOLENOID OXYGEN SENSOR GROUND PRESSURE SWITCH PRESSURE SWITCH (AUTO TRANS. & KC4) PRESSURE RELAY (AUTO TRANS. & K C 4 ) A/C COMPRESSOR CONTROL RELAY ( L L 2 - 6 CYL.) ELECTRONIC CONTROL MODULE-OUTPUTS) SECTION C-PAGE 40 39 .8 PNK/BLK-...
  • Page 193 ■ 4 6 5 - 8 DK GRN/WHT TO ECM (LL2-6 CYL.) ELECTRONIC CONTROL MODULE-OUTPUTS SECTION C-PAGE 41 -39- 8 PNK/BLK 30 .8 PNK-...
  • Page 194 SECTION C-PAGE 42...
  • Page 195 CIRCUIT WIRE CIRCUIT WIRE COLOR CAVITY DESCRIPTION COLOR CAVITY DESCRIPTION SIZE SIZE DK GRN/WHT FUEL PUMP RELAY DRIVE NOT USED 4 6 5 DK GRN/WHT A/C RELAY 4 3 6 PNK/BLK AIR SW SOLENOID 4 5 9 NOT USED 4 4 4 LT GRN/BLK STEPPER COIL B LOW EVRV SOLENOID...
  • Page 196 M AN IFO LD THROTTLE -440-1.0 ORN- ABSOLUTE POSITION PRESSURE SENSOR SENSOR 4 5 2 .5 BLK -4 3 9 - 8 PNK/BLK - 4 1 7 -.5 DK BLU ■416-.5 GRA -4 5 0 -.8 BLK/W HT----- - 4 5 2 .5 BLK-------------- 4 5 5 .8 BLK/RED------- - 4 5 5 .8 BLK/RED------- 4 3 2 .8 LT GRN/BLK-...
  • Page 197 439- 8 PNK/BLK - GROM M ET PE947G TO ECM (LB4-6 CYL.) ELECTRONIC CONTROL MODULE INPUTS SECTION C -P A G E 45 -439 .8 PNK/BLK 439 .8 PNK/BLK -...
  • Page 198 <-» OPENS IN CLOSES WITH % 4TH GEAR INC. TEMP. v ELECTRONIC 4 4 6 SPARK TIMING ' -----OPENS ON OPENS ON 4 - 3 SHIFT TRANSMISSION CONVERTER CLUTCH SOLENOIO E.V.R.V. 4 4 6 .8 LT BLU---------- SOLENOID 4 4 4 .8 LT GRN/BLK — 4 4 3 .8 LT GRN/WHT - 4 4 2 .8 LT BLU/BLK—...
  • Page 199 4 2 2 .8 TAN/BLK ------- - 4 2 2 - 8 TAN/BLK GROM MET 4 3 5 .5 G R A -------------- 4 3 5 - 5 GRA PE9470 4 5 9 .8 DK GRN/WHT ■ 4 6 5 .8 OK GRN/WHT . 59 .5 OK GRN ---------- •...
  • Page 200 SECTION C-PAG E 48...
  • Page 201 CIRCUIT WIRE CIRCUIT WIRE CAVITY COLOR DESCRIPTION COLOR CAVITY DESCRIPTION SIZE SIZE 4 6 5 DK GRN/WHT FUEL PUMP RELAY DRIVE NOT USED A/C RELAY 4 5 9 DK GRN/WHT NOT USED NOT USED 4 4 4 LT GRN/BLK STEPPER COIL B LOW 4 3 5 EVRV SOLENOID 4 4 3...
  • Page 202 GROMMET --------- 4 2 2 .8 TAN/W HT - " 1 4 4 6 .8 LT BLU - STOP LAMP SWITCH ELECTRONIC CONTROL MODULE 29 8 4 2 3 5 CONNECTORS 12020753 I____ 446 .8 LT B L U -------- j 5S t - L _ | 4 6 9...
  • Page 203 SELECTOR QUADRANT SWITCH 6 4 2 2 6 -4 GROMMET 12015957 (St; HIGH - 1 5 6 - 5 WHT - & - 1 5 0 .8 BLK — & FOUR WHEEL DRIVE INDICATOR 1 56 12015199 = £ 5 = &...
  • Page 204 JU N C TIO N BLOCK TO ECM 8 9 1 7 3 7 2 5 0 -1 .0 BRN FUSE BLOCK -T O ALTERNATOR SPLICE 39 (LN8-4 CYL.) AIR CONDITIONING (RPO C60) SECTION C-PAGE 52...
  • Page 205 JU NCTIO N BLOCK 8 9 1 7 3 7 2 5 0 -1 .0 BRN 1 2 0 1 5 9 5 2 5 0 -2 .0 BRN 8 9 1 7 4 7 6 FUSE BLOCK LB4-V6 LL2-V6 - ►...
  • Page 207 -----33 .5 TAN /W H T-------------------- l/P CLUSTER ----- 3 3 -.5 TA N /W H T----------------- - - CONN 4 5 6 (GAGES) l/P CLUSTER CONN (TELLTALE) • c I______ I__________ 30 | < 1 2 0 1 6 1 3 3 1 2 0 1 5 1 3 3 - 3 3 .5 TA N /W H T- <...
  • Page 208 ILLUM ILLUM ILLUM ILLUM CIGARETTE LIGHTER 1 2 0 4 1 2 9 6 1 2 0045 43 INSTRUMENT PANEL LAMPS (TELLTALE) SECTION C-PAGE 56...
  • Page 209 ILLUM ILLUM ILLUM ILLUM ILLUM ILLUM CIGARETTE LIGHTER 12 0412 96 K U S L W C M 3 -------------- < o [ ] C 3 C 3 RADIO FRONT POWER FUSE BLOCK 12 00 4 5 4 3 INSTRUMENT PANEL LAMPS (GAGE) 1 2 0 0 4 2 6 7 SECTION C-PAGE 57...
  • Page 210 ( E 3 1 2 B D S) B B D 1 0 B 0 G) IS H ffl (0 (E < EJ E) El IS C B B B (E IGN/GAUGES IP * r w « 2 0 AMP | / S IP'S B ^ l [X3 Ekfi [...
  • Page 211 ILLUM ILLUM ILLUM ILLUM LEFT TURN SERVICE RIGHT TURN ENGINE SOON © r® HIGH BEAM BRAKE SEAT BELT r n O n “1 □ 3 0 j •11 • 12 3 9 | 11 50 1 5 | 1 I 4 1 "...
  • Page 212 1 2 0 1 5 9 5 7 PRESSURE G ROM M ET SW ITC H 8 9 1 7 5 8 0 1 2 0157 91 121-.8 WHT ■ 1 2 1 .8 WHT - {jT T T T Ifra ------- 150 .8 BLK- 1 2 0 4 0 7 0 5 4 1 .
  • Page 213 ILLUM ILLUM ILLUM ILLUM ILLUM 0 0 0 0 ® - 1 2 1 .8 W H T- fltfr ( c E \ ( $ ) ( S \ -1 5 0 -.8 BLK — 1 5 0 RPO U 16 -4 1 -.8 BRN/WHT- '(W IT H TACHI - SEAT BELT...
  • Page 214 PRESSURE SW ITC H PRESSURE SW ITCH PRESSURE SENDER PRESSURE SENDER ALL LL2 KC 4 AUTO GENERATOR CGH3 G ET INDICATOR LAMPS (TELLTALE) Dl— I I— SECTION C —PAGE 62 1 2 0 4 7 8 8 6 12045688...
  • Page 215 ILLUM ILLUM ILLUM ILLUM ---------------------------- <1----------------------------- • -----------------------------II------- ( 0 ) (d b ) ( © ) LEFT TURN SERVICE RIGHT TURN ENGINE RADIO 1 SOON HEATER LP I © n ® l/P COMP BOX LP ► ------------- (UTILITY ONLY! HIGH BEAM GROUND 1 5 0 .8 BLK-...
  • Page 216 ELECTRONIC -1 4 0 .8 ORN- CONTROL MODULE HORN RELAY 2 4 0 CONNECTOR IS m n iN G COL SWITCHES! |*401 , 4 6 S | u o | t 4 2 2 SEAT K L T * W ' - 23 8 4 3 5 | »...
  • Page 217 RADIO ) SEAT BELT LEFT TURN HEATER LP ► " l/P COMP BOX LP ► (UTILITY ONLY) GROUND 50 .8 BLK LIGHTER ► ST BLT ► - JUMPER 9 i - | 9 0 0 | | 8. - f a F i r .
  • Page 219 a r\ l / P COURTESY LAMP REAR DOME LAMP COURTESY LAMP 156 .8 WHT DOME LAMPS (UTILITY) 240-.8 ORN 240-.8 ORN SECTION C-PAGE 67 156 .8 WHT 156- 8 WHT...
  • Page 220 ■ 15 6 .8 WHT RIGHT H AN D 2 9 7 3 3 2 4 DOOR J A M B GROMMET SW ITC H 1 2 0 5 2 3 6 9 DOME LAM P 1 5 6 . 8 W H T . 15 6 -.8 W H T .
  • Page 221 CONVENIENCE CENTER • 8 0 .5 LT GRN - ■ 8 0 .5 LT GRN- \ > HORN RELAY BUZZER 1 (> ^ r a | 2 3 8 l | l 6 0 l | 2 3 7 | | 3 9 1 SCAT BELT SW GROUND HORN...
  • Page 222 8 9 0 0 4 4 4 RIGHT REAR 8 9 0 0 4 4 4 TREBLE RIGHT FRONT SPEAKER SPEAKER ANTENNA 1 2 0 0 4 5 4 5 4 6 .8 DK BLU - 11 5 .8 LT BLU REAR SPEAKERS 0>...
  • Page 223 RADIO EQUIPMENT SECTION C-PAGE 71...
  • Page 224 1 2 0 5 2 3 6 9 1 2 0 2 0 0 4 5 f r W F i l IH K 167 2 .0 TA N /W H T- [ s i 666 2 0 DK BLU . ---- jf c y : 66 - I—...
  • Page 225 -2 9 5 -2 .0 GRA- > S f t R ■ 2 9 4 -2 .0 T A N - < D f i i -1 9 4 -2 .0 BLK/W HT- -1 9 5 -2 .0 LT BLU — 1 2 0 1 5 3 4 4 1 2 0 5 2 3 6 9 RIGHT DOOR...
  • Page 226 RADIO ► HEATER ■ 1 5 0 .5 BLK- - 8 .5 W H T— CONV. 1 2 0158 92 CENTER l/ P CLUSTER. GAGES ONLY SPLICE 150 -1 5 0 -3 .0 BLK- LIGHTER ) INST. PNL. j LPS. SEAT BLT.
  • Page 227 CONVENIENCE CENTER HORN RELAY SEAT BELT SW 2 3 8 GROUND FASTE BELTS 2 37 IGNITION IGN KEY SW BATTERY LIGHTS ON SW HAZARD FLASH l/P COMPT. GROUND 2 3 8 .8 WHT S) @ HI S) ® 0 (E ® •...
  • Page 228 VISOR V A N IT Y MIRROR 12 04 7 7 8 1 141 -.8 BRN/WHT H □ VANITY MIRROR (RPO D64) SECTION C-PAGE 76...
  • Page 229 W INDSHIELD W ASHER PUMP (3 E) E 0 E IS E E ) G D E H ® 0 E El E D E) 13 S) 0 E ISJKLKl 1 5 A - WIPER rjoin T! r^ss-! 25 AMP t e w wSc1 C =J E kS REAR...
  • Page 230 VEHICLE SPEED CONTACTS CLOSED , SENSOR WITH PEDAL AT REST CRUISE CONTROL (RPO K34) — q d AUTOMATIC —D ID TRANS ONLY SECTION C-PAGE 78 BRAKE SW 1 2 0 1...
  • Page 231 R.H. GAS CYLINDER -8 .8 GRA- CYL ROD 12015163 REAR jT— l, ,1 'f c, W IN D O W 2962793 DEFOGGER -293 .3 PPL/WHT 293 .3 PPL/WHT ■ 293 .3 PPL/WHT---- ^ SW ITCH E 3 " 12015952 12015987 SPLICE &...
  • Page 232 CONTROL RELAY t = J -142-2.0 BLK- -142-2.0 BLK- f = l 12059884 12059885 2984164 12059885 12059884 LIFTGATE RELEASE SW ITCH G ROM M ET 20040276 -900-1.0 BRN TAIL GATE SOLENOID 12004886 2977253 MTT| O (i] § E E) E 0 (H 0 E <...
  • Page 233 156 .8 WHT FOR CONTINUATION FROM DOOR JAMB 156-.8 WHT OF ROUTING. 156 .8 WHT — SWITCHES 140-.8 ORN---- SEE DOME LAMP 140-.8 ORN • ____ I (RPO C91 ST100-03I53) FROM FUSE BLOCKS ► 8911772 8911773 .EH . □a 140 .8 ORN 240-.8 ORN- 12015163 CARGO LAMP (RPO UF2)
  • Page 234 75 .8 OK BLU FRAME GROUND R.H. SIDE MARKER LAMP 150 .8 BLK BACK-UP LAMP SWITCH TRANSMISSION R.H. (MANUAL TRANS) TAIL. STOP. NEUTRAL SENSE SPLICE 150 & DIR. & BACK UP LAMP SW LAMP (AUTO TRANS) GROMMET « > BACKUP 2989576 LAMP 24 .8 LT GRN...
  • Page 235 ■ 75 .8 DK BLU R.H. SIDE MARKER 2 4 .8 LT GRN LAMP BACK-UP T n p S I 2 9 7 3 4 0 7 AUTO TRANS LAMP SWITCH TRANSMISSION (MANUAL TRANS) « = > NEUTRAL SENSE V* . — &...
  • Page 236 FRAME GROUND HEAD. PANEL & DOME R . H . LAM PS SW ITCH SIDE MARKER LAMP GROM M ET TO l/P R.H. T A IL , STOP, & 2989576 COURT DIRECTIONAL LAMPS LAM P TO PANEL LAMPS DIMMER -9 .8 BRN- 9 .8 BRN- HO LP—ON SPLICE 9...
  • Page 237 TO FORWARD LIGHTING HEAD. PANEL & DOME R.H. T A IL, STOP, & LAMPS SWITCH DIRECTIONAL LAM P TO l/P COURT LAMPS 9 .8 BRN ■ 12034061 8 0 6 »•* 4 6 8 4 4 0 • J „ 9 0 0 1 2 0 U>...
  • Page 238 FRAME GROUND HEAD. PANEL & DOME LAM PS SW ITC H TO l/P CTSY LAMPS 9 .8 BRN 12 0340 61 80 6 1 4 1 4 5 6 4 4 0 : 9 0 0 I S I S S I ®...
  • Page 239 R.H. TO FORWARD SIDE MARKER LIGHTING LAMP HEAD. PANEL & DOME LAM PS SW ITC H TO l/P CTSY LAMPS TO PANEL 12020100 LAMPS DIMMER 9 .8 BRN - SPLICE 9 V 12034061 94 29 II 92 9J 456 440 LICENSE is I I f 900...
  • Page 240 TO REAR - ► TO LH DIR LP DOME LP - ► TO TAIL & SIDE MARKER LPS TO RH DIR LF - ► TO BACKUP LPS TO FUEL PUMP : i s 6 SENSORS 8 9 0 0 4 4 1 8 9 0 0 4 4 0 AUXILIARY WIRE...
  • Page 241 - 2-5.0 RED JU N C TIO N BLOCK (REF ENG WRG BATTERY CIRCUIT) 3 0 AM P IN LINE FUSE 94 2633 1 ea Q BATTERY - 1 9 TAIL LIGHTS - 1 8 LH DIR LAMP - 1 9 RH DIR LAMP TRAILER DIR GRD - 2 2...
  • Page 243 1988 R/V TRUCK S E C T I O N P A G E D E S C R I P T I O N P A G E D E S C R I P T I O N POWER DISTRIBUTION (GASOLINE) ECM CHART (DIESEL) POWER DISTRIBUTION (DIESEL)
  • Page 244 TO BRAKE WARNING SYSTEM o > GENERATOR - 8 BLK ---- BATTERY SHEET ENGINE GROUND m e t GROUND SHEET M ETAL POW ER D IS TR IBU TIO N GROUND RPO TP2 FUSE BLOCK L 2 5 - 6 C YL. LE 8, L T 9 -V 8 (IF EQUIPPED) SECTION D-PAGE 2...
  • Page 245 130 .2 2 8RN/WHT - REAR POWER D ISTR IB U TIO N GROUND FUSE BLOCK RPO TP2 L 0 5 , L I9 -V 8 (IF EQUIPPED) SEE PAG E___ SECTION D-PAGE 3...
  • Page 246 1 3 0 - .2 2 BRN/WHT TO BRAKE WARNING SYSTEM ..--------- — SHEET REAR FRONT M ETAL — P O W E R D IS T R IB U T IO N GROUND RIGHT H AN D LEFT H A N D FUSE BLOCK L L 4 , L H 6 D IES EL BATTERY...
  • Page 247 JUNCTION BLOCK SPLICE 2 -3 .0 RED ------ ■2-8.0 RED- FUSIBLE LINK GROMMET AUXILIARY 1 2 0 2 0 4 5 7 BATTERY SHEET RELAY ■ 2 -3 .0 RED ■ 1 2 0 0 4 8 8 7 METAL GROUND 141- 8 BRN/WHT' - 1 5 0 8 .
  • Page 248 SECTION D-PAGE 6...
  • Page 249 IGN/ACC POWER CIRCUIT 76 30-AM P CIRCUIT BREAKER AUTO TRANS/CONV CLUTCH MD8 DIESEL ONLY TAIL GATE-POWER WINDOW AUXILIARY BATTERY POWER WINDOWS FOUR WHEEL DRIVE ILL LP PANEL LAMPS REAR DEFOGGER REAR DEFOGGER LAMP FOUR WHEEL DRIVE IND. LP CRUISE CONTROL DIESEL AUXILIARY FUEL TANK SELECTOR SWITCH POWER CIRCUIT 60...
  • Page 250 R.H. SIDE MARKER HIGH-LOW (3 0 E 0 E IS (El H EAD LAM P r a Q s ) E l 1 S 9 S 1 1 < *o° E iild Q D 0 13 B 0 E 11 E ■ATT PWft n —...
  • Page 251 FRAME GROUND R.H. SIDE MARKER -151-3.0 BLK S 3 S 3 1 9 H IB IB 0 0 LAM P SHEET E 13 H B 15 (0 E < M ETAL w o o 6294015 GROUND B D SI 09 19 IB 10 81 •ATT W W W r n u r ^...
  • Page 252 R.H. HEADLAM P R.H. SIDE MARKER SWITCH SIDE MARKER LAM P LAMP 6 2 9 4 0 1 5 R.H. TAIL, STOP & DIRECTIONAL LAMP 9-.8 BRN- SPLICE 9 R.H. PARK & DIRECTIONAL LAM P BACKUP SHEET LAMP M ETAL GROUND SPLICE 150 | IS | 14 j...
  • Page 253 HEADLAM P SW ITCH RIGHT H AN D SIDE MARKER LAMP BACKUP LAMP r ® 9 .8 BRN- R.H. PARK & TAIL, STOP, DIRECTIONAL & DIR LAMP LAM P 6 2 8 8 4 2 4 1 2 0 1 5 7 9 8 LICENSE LAMPS 9 .8 BRN...
  • Page 254 H EADLAM P WIDESIDE PICK UP SW ITCH SIDE MARKER LAM P R.H. TAIL. STOP & DIRECTIONAL LAMP R.H, PARK & DIRECTIONAL LAM P 1201 L.H. TAIL, STOP & DIRECTIONAL LAMP L.H. SIDE MARKER WIDESIDE PICK-UP LAM P M AR KER LA M P S IR05 ONLY) FLEETSIDE (E 63) REAR...
  • Page 255 RIGHT MARKER LAM P HEADLAM P SW ITCH CLOCK FRONT IDENTIFICATION < LAM PS 0 0 B S E 10 I I *** E ] E D a H O S IB II < B @ B 1 1 E I •ATT W W W 8*3 QSSP...
  • Page 256 R.H. FRAME R.H. 12034372 SIDE MARKER GROUND SIDE MARKER R.H. LAM P LAM P HEADLAMP - 1 5 1 3 . 0 BLK CONNECTOR r^sl □ D I D SHEET M ETAL 6294015 ■ 151-.8 BLK [ l S o ' | U r ~ 3 9 ~ | GROUND -151 3.0 BLK ■...
  • Page 257 S H E E T M E T A L 150 .8 BLK CONVENIENCE G R O U N D CENTER § FROM SIDE R .H . T A IL , S T O P & HORN RELAY SPLICE 150 MARKER LAMP TiT) D IR E C T IO N A L 13 U Q B...
  • Page 258 FROM R.H. SIDE MARKER LAMP FROM RH 150.8 BLK FRONT & REAR CLEARANCE LAMPS (RPO R 05 ONLY) ■19 .8 DK GRN 8911029 R.H. TA IL STOP & R.H. T A IL , STOP & DIRECTIONAL DIRECTIONAL LAM P LAM P (PART OF RH TAIL, STOP, DIRECTIONAL, &...
  • Page 259 FROM R.H. SIDE MARKER LAMP FROM RH FRONT & 1 5 0 .8 BLK REAR CLEARANCE © LAMPS (RPO R 05 ONLY) ■19 .8 DK GRN “ R.H. TAIL STOP & 8911029 R.H. TAIL, STOP & DIRECTIONAL DIRECTIONAL LAMP LAMP (PART OF RH TAIL, STOP.
  • Page 260 FRAME R.H. 12034372 GROUND SIDE MARKER SIDE MARKER LAMP R.H. LAMP — ---------151-3.0 HEADLAMP CONNECTOR r a & Q D n a SHEET METAL 6294015 ■ 151 .8 BLK GROUND 11 SO I U r 3 9 I -151-3.0 BLK ■ G U I S 151.8 BLK TO l/P...
  • Page 261 SHEET _ g g ^ _ ||, METAL 150 .8 BLK GROUND FUSE BLOCK 8 3 B 3 IS B I!IO O | > R.H. TAIL, STOP & FROM SIDE SPLICE 15 0 < ---------------- MARKER LAMP DIRECTIONAL I m a B IB ID ID <...
  • Page 262 CONVENIENCE CENTER H E LA V UM k 2004267 BUZZER C D f v i s j r a Q RIGHT ( 2 3 S ll 1 6 0 1| 2 3 7 1| 3> | Z 62 HORN 2 3 8 SCAT K L T SW GROUND FASTE...
  • Page 263 TO PARK BRAKE WARNING l/P CLUSTER CONN. START (L25-V6; LE8, LT 9 -V 8 ) FUSE BLOCK SECTION D-PAGE 21...
  • Page 264 • 19 BLK -6 -3 .0 PPL - STARTER MOTOR SOLENOID TO PARK BRAKE WARNING JU N CTIO N U J U 1 BLOCK 8 9 1 1 6 9 8 l/P CLUSTER <? = N u . CONN. 2 .8 R ED------ ©...
  • Page 265 . 32 BLK . 6 -3 .0 PPL- -2 -2 .0 RED 33 .5 TAN/WHT - SPLICE STARTER MOTOR fsJl j g> SOLENOID Q H f i a TO PARK m p u BRAKE 11 SO I U [~~39~| WARNING JUNCTION Q E n E ill 8 9 1 1 6 9 8...
  • Page 266 l/P CLUSTER CONN. • 2 5 - 1 . 0 BRN G E N E R A TO R IGNITION L 2 5 -V 6 FUSE BLOCK SECTION D-PAGE 24...
  • Page 267 TO A/C COMP 15 .8 BLK (LE8 ONLY) l/P CLUSTER CONN. -2 5 - 1 .0 BRN GENERATOR IGNITION LE8, L T 9 - V 8 SECTION D-PAGE 25 FUSE BLOCK...
  • Page 268 ■ 439 .8 PNK/BLK- - 4 3 9 .8 PNK/BLK- -4 5 3 .8 BLK/RED - -4 5 3 .8 BLK/RED- -4 3 0 - .8 PPL/WHT- -4 3 0 - .8 PPL/WHT - -4 2 3 .8 W H T ------- - 4 2 3 .8 W H T-------- - 4 2 4 .8 TAN/BLK- 4 2 4 .8 TAN/BLK ■...
  • Page 269 CONVENIENCE CENTER l/P CLUSTER CONN. IGNITION L05, L 1 9 - V 8 SECTION D-PAG E 27 FUSE BLOCK...
  • Page 270 OXYGEN . 4 3 9 .8 PNK/BLK - SENSOR 4 1 2 -.8 PPL 12010996 12016791 THROTTLE POSITION TO COOLANT SENSOR TEMP SENSOR 4 1 2 -.8 PPL SPLICE 452 / 4 5 2 .8 BLK 452 .8 BLK 4 5 2 .8 BLK ELECTRONIC 4 1 7 -.8 DK BLU 4 1 7 -.8 DK BLU...
  • Page 271 HOT FUEL HANDLING MODULE 0 GEl CZI E G I ° } D GROUND td \ IGNITION SW. FUEL PUMP FUSED s G D H E h 1 2 0 4 5 6 8 8 12010000 4 5 0 .8 BLK ■ TO PARK/ - ►...
  • Page 272 SPLICE 150 - 4 v J U U - « i FUEL SHUT- OFF VA LV E SEE PAGE GLOW PLUGS - L L 4 DIESEL SECTION D-PAG E 30...
  • Page 273 SPLICE 150 -1 5 0 -1 .0 BLK 1 5 0 -1 .0 BLK-------------- FROM ECM FROM FUEL FROM PRESSURE SWITCH BULKHEAD ENGINE CONNECTOR FROM WATER - 5 0 9 2 .0 BRN THERMO GROUND IN FUEL - 5 0 3 -2 .0 BRN THERMO SENSOR FROM RH BATTERY ( - ) FUSIBLE LINK...
  • Page 274 COLD V A C U U M A D V A N C E REGULATOR F A S T IDLE FAST IDLE COLD VA LV E SOLENOID A D V A N C E TEMPERATURE SW ITCH CONTROL SW ITCH 12052647 2977373 12004267 I n...
  • Page 275 COLD ® A D V A N C E FAST IDLE TEMPERATURE SW ITCH _ n _ FUEL SHUT OFF VALVE DIESEL ENGINE CONTROLS - L H 6 SECTION D-PAGE 33...
  • Page 276 IDLE AIR FROM ENGINE HARNESS CONN CONTROL HOT FUEL (L19) FROM B /U LAMP H ANDLING MODULE FROM VSS 440 .8 ORN 120 .8 TAN/WHT IGNITION Hi— i n V FUEL PUMP ■ 4 5 0 GROUND c = r 39 .8 PNK/BLK 450-.8 BLK/WHT E B - G E ] D...
  • Page 277 FRAME GROUND A U X FAN COOLING S W FROM RH HEADLAMP(S) PARK & DIR SIGNAL ► LAMPS SHEET M ETAL -1 5 1 -3 .0 BLK ------ GROUND DUAL HEADLAMPS ONLY (RPOV22) [Voir ■ 7 0 2 -2 .0 BLK/RED ■ -9 3 5 - 8 DK GRN —...
  • Page 278 EDjicS RIGHT TAN K ENGINE 6 2 8 8 4 4 0 AU X ILIA R Y [TsojUQF] 0 D n E 3 INSTRUMENT | IS I 14 I I 12 CLUSTER(S) SEE PAGE | 39 I U U □ n Q 3 r 3 9 78 1 □tea...
  • Page 279 ‘“ I ELECTRIC FUEL PUMP 9 2 1 -1 .0 GRA ■ ASSEM BLY (A U X ILIA R Y 9 3 1 .8 PNK/BLK RIGHT SIDE) IE 3 P S917234 TO BULKHEAD CONNECTOR FOR CONTINUATION OF WIRING, SEE FUEL CONTROL & IDLE AIR CONTROL ■...
  • Page 280 RIGHT-HAND REAR SIDE DIVERT ENGINE SOLENOID ■ 1 5 0 .8 B L K - GROUND SPLICE 9 0 0 .8 Y E L - . 3 9 .8 P N K /B LK . ■ 3 9 - .8 PNK/BLK - ENGINE SPLICE 9 0 0 - 9 0 0 .8 Y E L-...
  • Page 281 RIGHT-HAND DIVERT SOLENOID ENGINE ENGINE TO 4 GRD S TR A P - GROUND BODY GRD 9 3 6 .8 YEL — 3 9 .8 P N K/B LK . - 3 9 .8 PN K /BLK- ENGINE ■ 9 3 6 .8 Y E L - 3 9 - .8 PNK/BLK - AIR DIVERT SOLENOIO 12040753...
  • Page 282 SECTION D-PAGE 40...
  • Page 283 ENGINE GROUND RIGHT H AN D ENGINE TO BODY GROUND 4 GRD STRAP----------------------------- DIVERT SOLENOID 9 0 0 3 9 .8 PNK/BLK 4 1 9 .8 BRN/WHT DIRECT GROUND DIVERTER 9 0 0 .8 YEL SYSTEM 9 1 9 .8 TAN CHECK ENGINE RELAY 1 5 0 -.8 BLK...
  • Page 284 THROTTLE POSITION SENSOR COOLANT TEMP SENSOR L 0 5 ONLY OXYGEN SENSOR ELECTRO NIC C O N TR O L M O D U L E -IN P U T S L 0 5 , L 1 9 -V 8 SECTION D-PAGE 42...
  • Page 285 -439 .8 PNK/BLK 439 .8 PNK/BLK - ELECTRONIC C O N TR O L M O D U L E -IN P U T S L 0 5 , L 1 9 - V 8 SECTION D-PAGE 43...
  • Page 287 ELECTRONIC CONTROL M ODULE-O UTPUTS L05, L19-V8 SECTION D-PAGE 45...
  • Page 288 SECTION D-PAG E 46...
  • Page 289 CIRCUIT WIRE CIRCUIT WIRE DESCRIPTION COLOR CAVITY COLOR CAVITY DESCRIPTION SIZE SIZE FUEL PUMP RELAY DRIVE NOT USED 4 65 DK GRN/WHT AIR SWITCH SOLENOID NOT USED 4 3 6 4 4 4 LT GRN/BLK STEPPER COIL B LOW NOT USED 4 4 3 LT GRN/WHT STEPPER COIL B HIGH...
  • Page 290 CIRCUIT WIRE CIRCUIT WIRE DESCRIPTION COLOR CAVITY DESCRIPTION COLOR CAVITY SIZE SIZE SYSTEM RETURN MANIFOLD ABSOLUTE PRESS 4 5 2 4 3 2 LT GRN SYSTEM GROUND THROTTLE POSITION SWITCH 4 1 7 DK BLU NOT USED COOLANT TEMP. SENSOR 4 1 0 NOT USED NOT USED...
  • Page 291 ENGINE SPEED SENSOR THROTTLE POSITION SENSOR ELECTRONIC CONTROL M ODULE-INPUTS LH6 DIESEL ■151.8 BLK 151 .8 BLK ■ SECTION D-PAGE 49...
  • Page 292 COLD ADVANCE GLOW PLUG INHIBIT RELAY COLD ADVANCE C I H 3 531- 8 LT GRN/BLK CONTROL 2 9 7 7 2 5 3 ENGINE •450-1.0 BLK - £ / T \ 902 .8 DK GRN EGR DUMP 39 .8 PNK/BLK 4 3 5 435 .5 GRA EGR VALVE...
  • Page 293 TO ECM ELECTRONIC CONTROL M ODULE-OUTPUTS LH6 DIESEL CHECK ENG LAMP SECTION D-PAGE 51 -1 5 1 .8 BLK DRIVER CONNECTOR...
  • Page 294 -4 2 2 .8 TAN/BLK- -4 4 6 .8 LT BLU — rJ L STOP LAMP 120 2 SWITCH 409 J 4 490 (M D8 ONLY) 490 • 0 490 BO 0 401 TRANSMISSION ELECTRONIC CONVERTER CLUTCH 404 fO 4 » CONTROL MODULE SOLENOID CONNECTORS...
  • Page 295 ■ 4 2 2 .8 TAN/BLK - - 4 2 2 - 8 TAN/BLK TRANSMISSION TO ECM KICKDOWN SEE PAGE LOS ONLY SOLENOID TO ALDL IL 0 5 ONLY) L 0 5 /L 1 9 ONLY SPLICE 4 2 2 ENGINE 55 .8 O RN ---------------- •...
  • Page 296 G R O U N D BLOWER S W IT C H DIODE (NOT USED WITH LE8.LT9.L25, -8 9 9 -5 CAPAC J U N C T IO N AIR CONDITIONING (RPO C60) BLOCK SECTION D-PAGE 54...
  • Page 297 BLOW ER S W IT C H r-pOllLsoJ—I 12004101 u > 52-5.0 ORN -51-1.0 Y E L - 8900420 -52-2.0 ORN- ■52-5.0 PPL SPLICE 52 2977940 2977253 8900420 2977518 2977253 -2 BLK- RESISTOR GROMMET 8911215 REAR BLOWER MOTOR GROUND 03 &) IS B IS IE) C D ts E) a (B E) E "0 0...
  • Page 298 RESISTOR BLOWER MOTOR E U n D L l E d l 2 9 6 5 0 1 9 2 9 7 7 9 7 6 GROMMET 8 9 1 1 2 1 7 1 2 0 0 4 0 6 7 —5 2 -2 .0 ORN- ■...
  • Page 299 BLOWER SWITCH • 5 1 2 .0 YEL- -952 2.0 DK GRN- GROMMET GROMMET 8905790 12004752 12015958 2977976 RESISTOR in i 1180 j GROUND 12004267 50-2.0 BRN * L H / 12004727 O 83 IB ■ o O ID 83 B IS ■ IB ffl ID 12004740 o o is a ii o t o ■nrv...
  • Page 300 SECTION D-PAGE 58...
  • Page 301 ILLUM ILLUM ILLUM ILLUM ILLUM l/P CIRCUIT ROUTING HEATER WITH TACHOMETER A/C CONTROL ASSEMBLY W/O-l/P CIRCUIT ROUTING WITHOUT TACHOMETER GROUND INSTRUMENT PANEL LAMPS FRONT SECTION D-PAGE 59 FUSE BLOCK...
  • Page 302 2962965 -35 .5 DK G RIM ---------------- METAL COOLANT E O S E TEMP 12020779 TEMP SW ITCH < 09 1 SENDER E (B IB IS E ------------- 35 .5 DK GRIM- - 39 .5 PNK/BLK 35 .8 DK GRN - DIESEL ONLY CS 89 LT9.
  • Page 303 ILLUM ILLUM ILLUM ILLUM ILLUM l/P CIRCUIT ROUTING WITH TACHOMETER ELECTRIC FUEL METER/PUMP TANK UNIT L05/L19 INSTRUMENT PANEL GAGES SECTION D-PAGE 61...
  • Page 304 (0 « IA I) Z9 3 0 V d - a N0I1D3S 611 SO I CJI0N310S NMOOXOIX SNVH1 SdlAIVl aO lVOIQNI ----------13A 8 80S o i n v o i — NUO 8 -------- NUO 8 -E0S- 611 '9 0 1 -----X lfl/X N d S -6E- u osn 3s land Nl H 31VM...
  • Page 305 ILLUM ILLUM l/P CIRCUIT ROUTING WITH TACHOMETER < 0 W/O l/P CIRCUIT ROUTING ___________ WITHOUT TACHOMETER z S \ 150 / \ l 1 5 o j / 150 y BRAKE CHECK ENGINE rxJ---- La L 0 5 S p l 1 1 9 ONLY □...
  • Page 306 -39 .8 PNK/BLK SEAT BELT RETRACTOR LH 6 O N L Y SWITCH 2 3 8 .8 B LK /W H T - 1 5 0 -.8 B L K ------- A L L E X C EP T LH G FR O M G LO W ** PLU G S L A M P D IESEL...
  • Page 307 8 9 0 0 3 7 1 -33 .5 TAN/WHT Tsoi 1 [ 3 0 0 | l G N 3 1 BA1 2 | B * T i r m A C C i m J I G R D i f*33 1 ]|—...
  • Page 308 12004887 12 0048 85 - 1 4 1 . 8 BRN/WHT F' P ------------- 1- gg i ® (S I «*« ■ IE 0 (3 3) H S I ffil E I < 1 s s a i 4-WD 1 4 1 .8 BRN/WHT- INDICATOR SH U N T LAMP...
  • Page 309 CRUISE CONTROL MODULE 4 0 3 CRUISE VENT VALVE 4 0 2 CRUISE CONTROL VAC 4 0 0 SPEED SENSOR 3 9 9 CRUISE SERVO 3 9 8 _ CRUISE SERVO 3 97 ELECTRONIC CRUISE 150 _ GROUND BRAKE SW. CRUISE ENGAGER SW.
  • Page 310 RIGHT REAR RIGHT DOOR HAND JAMB DOOR SWITCH JAMB 1287 GROf l/IMET 0 6 MODEL ONLY a n a - 1 2 9 8 4 3 6 9 LEFT HAND DOOR HEADLAMP SWITCH JAMB SWITCH DOME LAMPS SECTION D-PAGE 68...
  • Page 311 2 9 6 2 7 9 3 CARGO ----------4 0 -.8 ORN LAMP SWITCH 4 3 & 03 MODELS CARGO 140 H---------- 1 40 .8 ORN LAMP 4 3 & 0 3 2 9 6 2 7 9 3 MODELS ■...
  • Page 312 TO ROOF 9 .8 BRN -9 -.8 BRN ■ MARKER LPS (RPO 4 0 1 ) • 4 0 .8 ORN ONLY — 2 9 7 3 3 8 4 8 9 9 0 0 4 4 4 0 ^ 0 — I—...
  • Page 313 2973384 FRONT SPEAKER < CLUSTER - CONN. 1 2 0 0 4 5 4 4 a — *eez j."«i 201| J ■urr RADIO RECEIVER H 0 (*3 @ (E «•»* □ 0 © [c ] IS H IS H I IB "°°...
  • Page 314 circuit 666 2.t) DK BLU I BREAKER 167-2.0 TAN I = S 166-2.0 DK BLU/WHT - 76-2.0 PNK 1 2 0 0 4 1 4 0 RIGHT HAND 667-2 0 BRN ■ WINDOW 12034136 MOTOR 1 2 0 1 5 3 4 5 TO RH DOOR 6 6 7...
  • Page 315 1 2 0 1 0 3 6 6 1 2 0 1 0 3 6 6 GROMMET GROMMET 6 6 8 -2 .0 DK BLU RIGHT REAR 6 6 9 -2 .0 BRN WINDOW MOTOR RIGHT REAR WINDOW SWITCH c ir c u i t 6 6 8 -2 .0 DK BLU- J p J g g J —...
  • Page 316 ------ 150-3.0 BLK •150-3.0 BLK m s — f f l - CUT OUT FRAI FRAME □ D -------- 1 SWITCH MOTOR 1 5 3 0 0 0 0 2 1 5 3 0 0 0 2 7 BRK GRN BLAZER ONLY ■...
  • Page 317 8 .8 GRA REAR W IN D O W DEFOGGER SW ITCH 2 9 7 7 9 7 6 6 2 8 8 5 8 5 6 2 8 8 5 8 5 2 9 7 7 9 7 6 8 9 1 1 2 1 3 8 9 1 7 5 8 3 GROM M ET...
  • Page 318 DOOR LOCK RELAY /THl 2 9 8 4 3 7 8 -2 9 5 -1 .0 GRA- RIGHT HAND -2 9 5 -1 .0 GRA- - 2 9 5 -1 .0 GRA- DOOR LOCK - 2 9 4 - 1 .0 TAN - -2 9 4 -1 .0 T A N - MOTOR -2 9 4 -1 .0 T A N -...
  • Page 319 RIGHT REAR DOOR LOCK MOTOR 1 2 0 1 5 3 4 4 < o «e i* . < D LEFT REAR DOOR LOCK MOTOR 12010366 GROMMET POWER DOOR LOCKS TO BUS BAR (RPO AU3) 4-DOOR GROUND SECTION D-PAGE 77 12004267...
  • Page 320 09 0 ffl U G D ««»» ffl a IS E ) E 1 5 0 .8 BLK- S S dj 1] 0 WINDSHIELD S H U N ? WIPER MOTOR GROUND £9 K*l [X ] frfl | FRONT REAR FUSE BLOCK 9 3 -.8 WHT 93 .8 W H T-...
  • Page 321 RtAH si ® si (3 0 3<> 150 .8 BLK- El (D a s ® ® ® •ATT a c c ir e r v i SH U N T SH U N T H B T T T O TU BUS H ll T J f ____...
  • Page 322 SECTION D-PAGE 80...
  • Page 323 SHEET TRANSMISSION METAL BACKUP 19 H IS IQ ID « • GROUND LAMP SWITCH S B 1 SI IS 150 .8 BLK- - e < § H n « 0 (AUTO TRANS) is a (B IB ONLY tm m ) SPLICE 150 FROM RIGHT HAND TAIL.
  • Page 324 BACKUP LAMP BACKUP {PART OF RH TAIL, STOP AND DIR LAMP LAMP ASM) (PART OF RH TAIL. STOP AND DIR LAMP ASM) -24 .8 LT GRN PART OF LAMP ASM LAMP ASM GROUND 6 2 8 8 5 8 5 6 2 8858 5 2 4 .8 LT GRN - •...
  • Page 325 FROM R.H. SIDE MARKER LAMP FROM R.H. SIDE FROM R.H. TAIL. STOP & DIRECTIONAL SIGNAL LAMP 1 50 .8 BLK 2 4 .8 LT GRN RIGHT HAND FROM END GATE BACKUP «■ IDENTIFICATION LAMPS LAMP TO BULKHEAD CONNECTOR TO BULKHEAD FOR REMAINDER CONNECTOR OF CIRCUIT...
  • Page 326 SUBURBAN R.H. ONLY SIDE MARKER LAMP R.H. TAIL, STOP & DIRECTIONAL HEADLAMP LAMP SW ITCH 9 .8 BRN- SPLICE 9 § 150 .8 BLK X E D BACKUP SHEET LAMP M ETAL GRN SPLICE 150 LICENSE LAMP | 15 | 14 [ | 12 l «...
  • Page 327 R.H. SIDE MARKER LAMP R.H. TAIL STOP & DIRECTIONAL HEADLAMP SW ITCH LAMP - 1 5 0 . 8 BLK SHEET M ETAL GROUND - 9 .8 BRN 8 9 1 1 0 2 9 150 .8 BLK- BACK UP LAMP SPLICE 150 LICENSE...
  • Page 328 RIGHT HAND 1 ® SIDE MARKER LAMP HEADLAMP SW ITCH BACK UP LAMP ® 9 .8 BRN- LICENSE l « I ’ 5 141 1 2 0 1 5 7 9 8 LAMPS * • -9 8 BRN ------ 9 8 BRN-------- SPLICE 9 1 2 0 1 5 0 2 4 8 9 1 7 2 3 4...
  • Page 329 R.H. TAIL, STOP & DIRECTIONAL HEADLAMP LAMP 6288424 SWITCH |15|1«| | 1 2 1 1 M ® «J| ~ 1 93 33 | -9 8 BRN 1 2 0 1 5 0 2 4 8 9 1 7 2 3 4 l c=:p r g 8 9 1 7 2 3 2 -40 .8 ORN...
  • Page 330 R.H. SUBURBAN SIDE MARKER ONLY LAMP R.H. TAIL, STOP & DIRECTIONAL HEADLAMP LAMP SW ITCH r - ® ^ 5— P A R K £ § O F f & H E A D P A R K OFF O P L-o—...
  • Page 331 R.H. SIDE MARKER LAMP R.H. TAIL STOP & HEADLAMP DIRECTIONAL SW ITCH LAMP RIGHT HAND CLEARANCE LAMPS (RPO R05) 1151141 I 1 2 93 33 | M » « 1 i ■9 8 BRN L^ Jl 4 3 9 | 4 2 0 | | 12015024 V I J 3 5 | 2 5 ]...
  • Page 332 RIGHT HAND SIDE MARKER © LAMP HEADLAMP SW ITCH BACK UP LAMP 9 8 BRN- £ LICENSE LAMP » ) ’ s ) ~™) ^ X Z Z H ) -j| 12015798 1 15 1 14 I l 12 LICENSE 8 B R N ^ —...
  • Page 333 R.H. TAIL, STOP & DIRECTIONAL HEADLAMP LAMP 6 2 8 8 4 2 4 SW ITCH [ 15 | 14 | | 12 3 3 | l » l H r - - ■ - i -9 - 8 BRN 1 2 0 1 5 0 2 4 8917234 8917232...
  • Page 334 TO TAIL, STOP TO TAIL, STOP DIR SIG, DIR SIG. MARKER & — MARKER & BACKUP BACKUP JUNCTION BLOCK JUNCTION BLOCK LAMPS LAMPS (W/O TP2-AUX BATTERY) (W/O T P 2 -A U X BATTERY) 30 AMP 30 AMP FUSE FUSE GROUND GROUND BODY...
  • Page 335 1988 P CHASSIS SECTION E PAGE DESCRIPTION PAGE DESCRIPTION EMISSION CONTROLS (6 CYL.) POWER DISTRIBUTION (6 CYL.) EMISSION CONTROLS (8 CYL.) POWER DISTRIBUTION (8 CYL.) EMISSION CONTROLS (DIESEL) POWER DISTRIBUTION (DIESEL) FUSE BLOCK DETAILS ENGINE CONTROLS (DIESEL) HEAD LAMPS & PARKING LAMPS GLOW PLUGS (DIESEL) MARKER LAMPS ELECTRONIC CONTROL MODULE (ECM)-INPUTS (8 CYL.)
  • Page 336 POWER DISTRIBUTION L 2 5 - 6 CYL. BODY STYLE- 4 2 FRONT FUSE BLOCK SECTION E-PAGE 2 REAR...
  • Page 337 > I S \ *onrr>«------------------- - ip -3 2 BLK POWER DISTRIBUTION LE8 V-8 BODY S T Y L E -3 2 FUSE BLOCK SECTION E - PAGE 3 REAR...
  • Page 338 POWER DISTRIBUTION LT9, V-8 BODY STYLE- 4 2 FUSE BLOCK SECTION E - PAGE 4 REAR...
  • Page 339 -3 2 BLK (BATT CABLE) POWER DISTRIBUTION L 0 5 - V 8 FRONT REAR FUSE BLOCK SECTION E-PAGE 5...
  • Page 340 CLUTCH SWITCH (MAN TRANS) NEUTRAL START & BACK-UP SWITCH (AUTO TRANS) STARTER M OTOR SOLENOID < u FUSIBLE SPLICE TO FUEL PUMP RELAY & FUEL PUMP OIL PRESSURE SENSOR TO ECM. ESC & SWITCH EVRV & FUEL INJECTORS -3 2 BLK 32 BLK (BATT CABLE) TO AIR...
  • Page 341 0 RED (P32) THERMO HW - ^ 5 3 * - — ; ! 3 » N V v---- INSTRUMENT RED-THERMO H W - I — ' \ \ PANEL GROUND — •"»---------n — — r i --------- n — GROUND FUSE BLOCK -----...
  • Page 342 CAVITY " W " - CIRCUIT 5 0 IGN "O N " 25A FUSED FEED — HTR & A/C CAVITY " I" CIRCUIT 3 9 ]- - | CAVITY "A ' -CIRC U IT 141 \ IGN "ON & CRANK" 20A FUSED FEED IG N -"O N &...
  • Page 343 CAVITY "W' -C IR C U IT 50 IGN " O N " 2 5 A FUSED FEED — HTR & A/C CAVITY " I" CIRCUIT 39 CAVITY " A " -C IR C U IT 141 IGN "ON & CRANK" 20A FUSED FEED IG N - "...
  • Page 344 RIGHT-HAND RIGHT HAND HIGH-LOW SIDE MARKER LAMP HEADLAMP 2 9 7 3 3 8 6 (P32) LAMP —P32 1 2 0 3 4 3 7 2 (P42) I32/E 33 ONLY — P42) TO INSTRUMENT CLUSTER 6 2 9 4 0 1 5 1 1 -1.0 LT GRN - 12 .8 TA N -------- 1 5 1 -3 .0 BLK...
  • Page 345 R.H. SIDE MARKER SIDE MARKER SHEET LAMP LAMP METAL GROUND 6294015 1 5 1 -.8 BLK R.H. PARK & R.H. TAIL, DIRECTIONAL HEADLAMP STOP, & LAM P p p l DIRECTIONAL SWITCH LAMP SPLICE 9 9 .8 BRN - R.H. LICENSE LAMP ■...
  • Page 346 (S T E E R IN G C O L S W IT C H E S ! DIRECTIONAL SIDE MARKER SIGNAL SW LAMP LAMP—P32 — (E32/E33 O N L Y -P 4 2 ) -1 7 -1 .0 W H T----- -1 9 -1 .0 DK GRN- -1 8 -1 .0 YEL------- •...
  • Page 347 SIDE MARKER DIRECTIONAL SIGNAL SW LAMP LAMP—P32 IE32/E33 ONLY —P42) PROVISIONS FOR RH TAIL, STOP & DIRECTIONAL LAMP (P32) R.H. TAIL, STOP & DIRECTIONAL LAMP (P42) PROVISIONS FOR L.H. TAIL. STOP & DIRECTIONAL LAMP (P32) L.H. TAIL, STOP & DIRECTIONAL LAMP (P42) L.H.
  • Page 348 HORN RELAY 1 29 1 L iL f240] -2 8 -.5 BLK • DIRECTIONAL SIGNAL SW PROVISIONS I < s r l FOR DOME 1561 LAMP *• 2 9 6 5 9 8 1 HEADLAMP -2 4 0 -1 .0 ORN IB ID C D B El (D B "...
  • Page 349 WIPER/WASHER SECTION E-PA G E 15...
  • Page 350 | : , 9 | 1 i 3 5 1 1 39 1 1 1 33 1 | l 6 ° | 1 30 1 1 1 * 1 1 ^ 1 i«r T /c 2 9 8 4 7 9 2 <...
  • Page 351 pS A — START/IGNITIOIM L E 8 -V 8 s£L B A TTER Y B O D Y S T Y L E - 3 2 SECTION E-PA G E 17 REAR FRONT...
  • Page 352 S T A R T /IG N IT IO N L T 9 -V 8 BO D Y S T Y L E - 4 2 SECTION E-PA G E 18 REAR FRONT...
  • Page 353 RED (P32) THERMO HW RED-THERMO HW — 32 BLK 32 BLK 2 -3 .0 RED <P42> 2 3 0 RED (B 3M )------------ 2 -5 .0 RED (B 3M )------------ STARTER — 6 3 .0 PPL !P42) 6 -5 .0 PPL (P32) MOTOR SOLENOID —...
  • Page 354 GROMMET 1 2 0 2 0 1 0 8 - 4 5 3 .8 BLK/RED- - 4 3 0 .8 PPL/WHT- ] = : - 4 2 3 .8 WHT.------- - 4 2 4 .8 TAN/BLK- 1 2 0 2 0 7 5 3 COIL JUMPER 2 9 7 7 2 9 3 (=3-...
  • Page 355 TO PARK/ CLUTCH i V l NEUTRAL SWITCH 1 .6 I a RELAY (MAN TRANS) I ■ ; 1 Lr I (AUTO ONLYI 8 9 1 1 9 NEUTRAL START & BACK-UP SWITCH (AUTO TRANS) TO CLUTCH START SWITCH (MAN TRANS) NEUTRAL SAFETY SWITCH (AUTO TRANS)
  • Page 356 SECTION E-PA G E 22...
  • Page 357 OXYGEN SENSOR 4 1 2 THROTTLE POSITION SENSOR ELECTRONIC CONTROL MODULE CONNECTORS THROTTLE BODY INJECTION (L05-V8) SECTION E-PA G E 23...
  • Page 358 GROMMET TO ECM 1 2 0 2 0 1 0 7 FUEL PUMP RELAY S T E P P E R 4 4 1 IDLE AIR CONTROL 1 2 0 1 5 7 9 8 GROUND ALTERNATOR BRACKET SYSTEM GROUND NO.
  • Page 359 ENGINE I f } 15 0 .8 BLK GROUND 9 3 6 .8 Y E L ----- DIVERT 39 .8 PNK/BLK - SOLENOID 1 2 0157 92 (NAS) - ( - 3 9 .8 PNK/BLK - ENGINE i — 1C O \ \ »...
  • Page 360 BODY GROUND RIGHT HAND DIVERT SOLENOID (N A 5 ) DIVERTER SYSTEM RELAY (N A 5 ) DIVERTER MODULE (N A 5 ) LEFT HAND DIVERT SOLENOID EMISSION CONTROLS — LE8 SECTION E-PA G E 26...
  • Page 361 ENGINE — 15 0 -.8 BLK GROUND RIGHT HAND 9 3 6 .8 YEL ----- DIVERT 3 9 .8 PNK/BLK • SOLENOID 1 2 0 1 5 7 9 2 (NA5I NB2 I - | - 3 9 .8 PNK/BLK - ENGINE n—...
  • Page 362 12 0526 41 COLD VACUUM ADVANCE REGULATOR - 5 5 . 8 ORN FAST IDLE FAST IDLE COLD VALVE SOLENOID TEMPERATURE ADVANCE SWITCH SWITCH CONTROL 2 9 8 4 0 9 2 12 0 0 4 2 6 7 I n 39 .8 PNK/BLK ■...
  • Page 363 1 2 0 2 0 2 7 4 FUEL SHUT- OFF VALVE GLOW PLUGS —LL4 DIESEL SECTION E-PA G E 29...
  • Page 364 MANIFOLD ■ 439-1.0 PNK/BLK- THROTTLE ABSOLUTE POSITION PRESSURE SENSOR — 440-1.0 ORN--- SENSOR 4 5 2 .8 BLK------ - 4 5 2 - >-41 7- 4 1 7 .8 DK BLU - 4 1 6 - 4 1 6 - 8 G R A ----- 4 5 5 - 8 BLK/RED- -4 5 5 - 8 BLK/RED------ 4 3 2 - 8 LT GRN/BLK-...
  • Page 365 TO ECM ELECTRONIC C O N TR O L M O D U L E -IN P U T S L 0 5 -V 8 SECTION E-PA G E 31...
  • Page 366 ELECTRONIC SPARK TIMING E.V.R.V. SWITCH FUEL PUMP RELAY FUEL PUMP OIL PRESSURE SENSOR & SWITCH 1 2 0 4 8 3 9 0 ELECTRONIC C O N TR O L M O D U L E -O U T P U T S L 0 5 - V 8 TO SPLICE 39 TO OIL...
  • Page 367 TO ECM ELECTRONIC C O N TR O L M O D U L E -O U T P U T S L 0 5 -V 8 SECTION E-PA G E 33 ■ 439 .8 PNK/BLK...
  • Page 368 CIRCUIT WIRE CIRCUIT WIRE CAVITY DESCRIPTION COLOR CAVITY COLOR DESCRIPTION SIZE SIZE FUEL PU M P RELAY DRIVE NOT USED 4 6 5 DK G R N /W H T N O T USED 4 3 6 AIR S W SOLENOID 4 4 4 LT GRN/BLK N O T USED...
  • Page 369 TRANSMISSION SPLICE 4 2 2 4 2 2 .8 TAN/BLK • ■ 4 2 2 .8 TAN/BLK - KICKDOWN ► TO ALDL SOLENOID TO AIR SWITCH ENGINE 5 5 .8 ORN ■ :: ( ..2 9 8 4 0 9 2 <...
  • Page 370 INSTRUMENT PANEL CLUSTER CONNECTOR SEE PAGE BRAKE PRESSURE WARNING 33 .5 TAN/WHT - LE8, LT9. L25 LE8. LT9, L25 (BODY STYLE (BODY STYLE 4 2 ONLY) 4 2 ONLY) LL4 (ALL BODY LL4 (ALL BODY STYLES) STYLES) BRAKE WARNING SYSTEM SECTION E - PAGE 36...
  • Page 371 FO R C O N T IN U A T IO N O F W IR IN G |— SEE B R A K E W A R N IN G S Y S T E M 8 9 1 1 1 4 9 1 50 6 2 9 4 4 6 8 1 5 0 .
  • Page 372 ILLUM ILLUM ILLUM TRANSMISSION WIPER/WASHER HIGH BEAM DIAL LAMP SWITCH LAMP SOCKET (LE8. LL4 ONLY) 8 9 0 5 3 8 1 WINDSHIELD WIPER • 15 0 -.8 BLK- | 1 5 0 | WASHER | 9 4 | SWITCH I 91 1 l «...
  • Page 373 ILLUM ILLUM ILLUM COOLANT COOLANT METAL FUEL PUMP FUEL PUMP HIGH BEAM TEMP PRESS OIL PRESS TEMP TEMP SENDER SWITCH SENDER SENSOR & SW SWITCH 6 2 8 8 7 0 4 8 | 1 1 1 I 30 | I 33 | |1501 39 | 1 39 | 1...
  • Page 374 SECTION E-PA G E 40...
  • Page 375 (S T E E R IN G C O L S W IT C H E S ) ILLUM ILLUM ILLUM DIRECTIONAL HIGH BEAM SIGNAL SW T - * A ft . T j e U i i -1 6 .8 PPL- ■27-1.0 BRN- TO l/P J _ * t ~...
  • Page 376 TRANSMISSION BACK-UP LAMP SWITCH IB ) 0 * * * (AUTO TRANS ® ONLY) G D O D IQ B Q ID Q < MANUAL C D C O B E) G D (B 0 TRANSMISSION •ATT ONLY £ ® E J O PROVISIONS [Ml [Sp ®...
  • Page 377 R.H. PROVISIONS FOR SIDE MARKER R.H. TAIL. STOP LAMP & DIRECTIONAL LAMP IP32) R.H. TAIL, STOP & DIRECTIONAL LAMP (P42) 8 BLK HEADLAMP .8 BLK SWITCH 2 9 8 4 8 6 5 SPLICE 9 R.H. 9- 8 BRN- LICENSE LAMP -9 .8 BRN- ■9- 8 BRN...
  • Page 378 R.H. SIDE MARKER LAMP R.H. TAIL, STOP & DIRECTIONAL HEADLAMP LAMP (P42) SWITCH PROVISIONS FOR LICENSE LAMP (P32) R.H. LICENSE LAMP (P42) SPLICE 9 8 BLK 9 .8 BRN- ------- 9 .8 BRN -9 -.8 BRN- -9 - 8 BRN 9 -1 .0 BRN- 9 .8 BRN- 9 .8 BRN...
  • Page 379 1988 M VAN SECTION F PAGE DESCRIPTION PAGE DESCRIPTION POWER DISTRIBUTION AUXILIARY HEATER (C36) BRAKE WARNING SYSTEM POWER DISTRIBUTION (ELECTRONIC CLUSTER ONLY) FUSE BLOCK DETAIL INSTRUMENT PANEL LAMPS (TELLTALE VERSION) INSTRUMENT PANEL LAMPS (GAGE VERSION) FUSE BLOCK DETAIL (ELECTRONIC CLUSTER ONLY) HEAD LAMPS &...
  • Page 380 I/P JUNCTION BLOCK TEMPERATURE LAMP TO BRAKE WARNING SYSTEM POW ER D IS TR IBU TIO N (EXC. ELECTRONIC CLUSTER) SECTION F-P A G E 2...
  • Page 381 l/P J U N C T IO N 3 0 W A Y BLOCK C O N N A^I1| | 3 '. l| | j u | |4 I ;| I I ’l TE M P E R A T U R E ZD CD ED ED C U D ►...
  • Page 382 POWER CIRCUIT 7 6 3 0 AMP CIRC BREAKER PNL L P S - 8 /1 0 AMP POWER WINDOWS ■ RR A/C SW LP RR AUX HTR SW IGNITION- 3 9 / 2 0 AMP DOME LAMP SW & LP CRUISE CONTROL- CIGARETTE LIGHTER LP &...
  • Page 383 POWER CIRCUIT 76 3 0 AMP CIRC BREAKER PNL LPS —8 /1 0 AMP POWER WINDOWS RR AUX HTR SW RR A/C SW LP DOME LAMP SW & LP 5 GRA- CRUISE CONTROL CIGARETTE LIGHTER LP ASHTRAY LP & CONVENIENCE TRAY LP 7 6 -3 .0 PNK —POWER W INDOW S- FOG LAMPS GLOVE BOX LAMP...
  • Page 384 TO R.H. l/P CLUSTER R.H. SIDE MARKER CONN LAMP HEAD LAMP (ELECTRONIC 1 5 2 -3 .0 BLK SHEET METAL GROUND TAIL LPS 20 AMP SPLICE 9 FROM W . WASHER PUMP FROM HTR BLOWER MOTOR 9 .8 BRN 1 1 -1.0 LT GRN 12-.8 TAN SPLICE 9 153-1.0 BLK...
  • Page 385 R.H. SIDE MARKER SIDE MARKER LAMP LAMP HEAD. PANEL & DOME LAMPS SWITCH ■ 2 4 0 .8 ORN ■ R.H. PARK & DIRECTIONAL TO TAIL LAMP LAMP 9> ■9 8 BRN ' TO l/P CLUSTER 1 2 0340 61 GROMMET CONN SPLICE...
  • Page 387 R.H. TAIL, STOP & l/P CLUSTER DIRECTIONAL 8 9 1 7 8 1 8 CONN LAMP HAZARD LAMPS SECTION F-P A G E 9...
  • Page 388 R .H . SIDE M A RK ER L A M P 6 2 9 4 0 1 5 DIRECTIONAL FLASHER 1 5 2-3.0 BLK --------- B S C g H l - FROM RH SHEET M E T A L HEADLAMP CONN G R O U N D SPLICE 15...
  • Page 389 R .H . T A IL , S T O P & D IR E C T IO N A L 8 9 1 7 8 1 8 L A M P DIRECTIONAL LAMPS SECTION F-P A G E 11...
  • Page 390 TO BUSBAR GRD 1 2 0 1 5 2 0 2 ■ 9 .8 BRN TO l/P 1 2 0 1 5 9 8 7 CONN 150-.8 BLK ■ 1 5 0 -.8 BLK 1 2 0 1 5 9 5 2 8 .8 GRA 8 .8 GRA —...
  • Page 391 CONVENIENCE CENTER r r * = > ---------------------------D — m uxat □ □ □ □ HORN □ □ □ □ RELAY 1 2 0042 67 —3i— ■ 2 9 -1 .0 DK GRN 0 6 MODEL ONLY 1 2 0 4 1 4 3 9 'STEERING COL SWI1CHESI 2 0 0 4 2 6 7 HORN...
  • Page 392 l/ p I/P JUNCTION l/P CLUSTER l/P CLUSTER 3 0 W AY BLOCK CONN CONN CONN r i n 42o| |4 S l||4 3 4 | |4 3 7 || 25 |T | 25 |43 7|434|45l|420j □ f l 30 I 31 I 35 | 7b I 24 T * n 1391 □...
  • Page 393 l/P J U N C T IO N BLOCK START (6 CYL.) SECTION F-P A G E 15...
  • Page 394 S IG C O N D - 4 3 9 .8 PNK/BLK - 4 3 9 .8 PNK/BLK — 4 2 3 - 4 5 3 .8 BLK/RED -4 5 3 -.8 BLK/RED - 0 4 3 0 H E ! -4 3 0 - .8 PPL/WHT - 4 3 0 .8 PPL/WHT R E F...
  • Page 395 I/P CLUSTER C O N N A U D IO BUZZER A LA RM 39- 8 PNK/BLK 25 .8 BRN 3 3 .0 PNK 4 3 9 .8 PNK/BLK FRONT REAR IGNITION (4 CYL.) FUSE BLOCK SECTION F-P A G E 17...
  • Page 396 ELECTRONIC CONTROL MODULE CONNECTORS STARTER IGNITION (6 CYL.) SECTION F-P A G E 18...
  • Page 397 25-.8 BRN l/P CLUSTER CONN AUDIO BUZZER ALARM 3 9 .8 PNK/BLK 2 5 -.8 BRN 3 -3 .0 PNK 4 3 9 - 8 PNK/BLK FRONT -REAR IGNITION (6 CYL.) FUSE BLOCK SECTION F-P A G E 19...
  • Page 398 SPLICE 4 5 2 OXYGEN TO COOLANT TEMP. SENSOR SENSOR 4 1 2 .5 PPL • 12 01 5 7 9 1 THROTTLE 1 2 0 2 0 1 0 8 1 2 0 2 0 1 0 7 POSITION GROMMET SENSOR ■...
  • Page 399 SPLICE 4 6 2 OXYGEN TO COOLANT 4 5 2 - 5 BLK SENSOR TEMP. SENSOR . 4 1 2 .5 PPL 4 1 2 .5 PPL WITH ELECTRONIC INSTR. CLUSTER TO ESC ONLY. HYBRID FUNCTION THROTTLE 4 8 1 -.8 R E D -------- ■...
  • Page 400 IDLE AIR CONTROL REDUNDANT GROUND TO ECM • i h g s a — l/P CLUSTER CONN D O E FUEL PUMP PRIME 12015133 FUEL CO NTR O L & IDLE AIR C O N TR O L ( L N 8 - 4 C Y L.) SECTION F-P A G E 22...
  • Page 401 IDLE AIR CONTROL- INJ. ACTUATOR OIL PRESSURE SWITCH FUEL PUMP BACKUP T O E C M l/P CLUSTER CONN r m i ii- | . 1 9 1 4 1 9 | 2 3 7 i i 4 ' 9 1 1 b | 3 9 | 3 0 |_ f 1 5 0 l i “...
  • Page 402 THROTTLE 452 .8 BLK ----- 417-.5 DK BLU POSITION . 452 .8 BLK ----- MANIFOLD SENSOR 452 .8 BLK---- 469- 8 BLK/RED - ABSOLUTE 472 .8 TAN ---- PRESSURE ■ 413-.5 T A N ----- SENSOR 450-1.0 BLK/WHT ■ 412-.5 PPL -------- 12065287 416 .5 GRA ■...
  • Page 403 SPLICE 452 -452 .8 BLK----- -4 5 2 .8 BLK-------- - 452 .8 BLK • -452 .8 BLK----- - 4 5 2 .8 BLK-------- 1 2 0 4 7 9 4 6 12020108 12020107 -469 .8 BLK/RED - -4 6 9 .8 BLK/RED — GROMMET -472 .8 T A N ----- - 4 7 2 .8 T A N --------...
  • Page 404 IDLE AIR TRANSMISSION CONTROL CONVERTER CLUTCH SOLENOID -120 .8 TAN/WHT - 1 2 0 4 0 7 5 4 ^ | < m | « « 2 j4 « 3 | « 4 4 ^ -420 .8 PPL------- -422- 5 TAN/BLK- -444 .8 LT GRN/BLK —...
  • Page 405 ■ 42 2 -.5 TAN/BLK TO ECU TO TCC BRAKE SW (AUTO ONLY) TO AUDIO BUZZER ALARM ELECTRONIC C O N TR O L M O D U LE (E C M )-O U T P U T S ( L N 8 - 4 C Y L.) SECTION F-P A G E 27 TO A/C COMPRESSOR...
  • Page 406 SECTION F-P A G E 28...
  • Page 407 CIRCUIT WIRE CIRCUIT WIRE CAVITY DESCRIPTION COLOR CAVITY DESCRIPTION COLOR SIZE SIZE FUEL PU M P RELAY DRIVE N O T USED 4 6 5 DK G R N /W H T N O T USED 4 2 2 TO RQ UE CONVERTER C LU TC H T A N /B L K 4 4 4 LT GR N /BLK...
  • Page 408 MANIFOLD THROTTLE ABSOLUTE POSITION PRESSURE SENSOR SENSOR 4 5 2 . 8 B L K - 4 5 2 - h 4 1 7 . I 4 1 7 - . 8 D K B L U ' - 4 1 6 - 4 1 6 - .
  • Page 409 451-.8 WHT/BLK - TO ECM ■ 4 5 1 .5 WHT/BLK 4 5 0 -.8 BLK/WHT - 4 3 7 .8 BRN 4 4 0 .8 ORN ELECTRONIC C O N TR O L M O D U LE (E C M )-IN P U T S •...
  • Page 410 ■ OPENS IN IDLE AIR 4TH GEAR C O N TRO L- IN J. AC TU ATO R ' ---- OPENS OS TR AN SM ISSIO N 1 2 0 1 5 7 9 8 CONVERTER CLUTCH SOLENOID 4 2 2 .5 TAN/BLK ------ 4 4 6 .8 LT BLU --------- 4 4 4 .8 LT GRN/BLK - 44 3 .8 LT GRN/WHT...
  • Page 411 ■450-1.0 BLK/WHT ■435- 8 GRA-------- , TO ELECTRONIC C O N TR O L M O D U LE (E C M )-O U T P U T S ( L B 4 - 6 C Y L.) SECTION F-P A G E 33 30 .5 PNK...
  • Page 412 SECTION F-PA G E 34...
  • Page 413 CIRCUIT WIRE CIRCUIT WIRE COLOR CAVITY DESCRIPTION COLOR CAVITY DESCRIPTION SIZE SIZE 4 6 5 D K G R N /W H T FUEL P U M P RELAY DRIVE N O T USED N O T USED 4 3 6 A IR S W SO LEN O ID N O T USED LT G R N /BLK...
  • Page 414 BRAKE SW -4 2 2 .5 TAN/BLK ■ © "1 1 2 0 2 0 0 4 3 A.L.O.L. TRANSMISSION CONVERTER FUSE BLOCK CLUTCH DETENT SOLENOID (AUTO ONLY) SECTION F-P A G E 36...
  • Page 415 INST LP 8 1072 105 2 REAR A /C SW ITC H -1 5 0 3 .0 BLK 12 01 5 2 0 2 2 5 0 3 .0 BRN REAR AIR CONDITIONING (RPO CG9) SECTION F-P A G E 37...
  • Page 416 12004267 458 .8 RED ■ SHEET M ETAL n o n i i M n GROUND COMPRESSOR ELECTRONIC CONTROL MODULE CONNECTOR 12041424 AIR CONDITIONING ( L N 8 - 4 CYL.) CONN & SEAL SECTION F-P A G E 38...
  • Page 417 1 2 0 0 4 2 6 7 SHEET M ETAL ,||- ( 5 * 2 a - -3.0-BLK • 152 GROUND 152-3.0 BLK- TO RH HEADLAMP l1 5 2 l TO RH PARK & DIR LAMP BLOWER r 5 2 COMPRESSOR TO W WASH PUMP MOTOR...
  • Page 418 1 2 0042 67 e - p HEATER BLOWER BLOWER SWITCH MOTOR 12 0040 67 1 2 0406 73 H E A D L A M P P A R K L A M P IB S) E E ) B B Q D B D IB 00 C D H E E) B W O O SI i...
  • Page 419 AU XILIAR Y HEATER 1 VACUUM SOURCE CONTROL SW ITCH 2 LO. MED & HI PORT 1 2 0 4 0 6 7 3 1 2 0 0 4 2 6 7 C " 3 HI PORT e -i -2 5 0 3 .0 BRN — ■...
  • Page 420 I/P CLUSTER l/P CLUSTER CONN CONN (ELECTRONIC CLUSTER ONLY) ■EL □ □ □ E 2 U G D -jCZDnEED • ( □ H a H s i u r m □ 0 (Z 3 □ n o n > » □...
  • Page 421 ILLUM ILLUM ILLUM ILLUM ILLUM • □ CHECK a > UNLEADED □ □ □ FUEL ONLY ENGINE BRAKE MPH I KM/H □ < □ *J F □ □ RADIO POWER INSTRUMENT PANEL LAMPS (TELLTALE) SECTION F-P A G E 43...
  • Page 423 CLUSTER CONN. INSTRUMENT PANEL LAMPS (ELECTRONIC) SECTION F-P A G E 45...
  • Page 424 INSTRUM ENT CLUSTER TELL TALE LAM PS ILLUMINATION BULBS REQUIRED: 9 WITH AUTO TRANS 8 WITH MAN TRANS IGNITION/GAGES 2 0 AMP l/P JU N C TIO N S 'S 3 0 W A Y BLOCK CONN S Z 9 K 3 D B B^S I °...
  • Page 425 ILLUM I L L U M ILLUM TEMP BATT ILLUM f l Q SERVICE ENGINE BRAKE SOON - 1 8 [ T ] □ U dD nD II ~ 3 9 C u t a □ 237) □ 419 ] 3 9 I HIGH BEAM RIGHT TURN...
  • Page 426 C O O LAN T TEMPERATURE - 3 5 - 5 OK GRN- TRANSDUCER 2 9 6 2 9 6 5 C O O LAN T z' TEM P - - 3 5 .5 DK GRN ( f i r ) ” 1 SENSOR 6 2 8 8 7 0 4 i 6 CYL.
  • Page 427 ILLUM ILLUM ILLUM © RIGHT TURN LEFT TURN - 3 9 .8 PNK/BLK - 3 0 -.5 PNK -3 1 -.8 TAN - 3 5 .5 DK GRN - 3 9 .8 PNK/BLK -1 5 0 - 3 .0 BLK IGNITION SW ITC H - ±...
  • Page 428 CONVENIENCE CENTER -41 9 - 5 BRN/WHT -4 5 6 .5 TAN/BLK l/P JU N C TIO N BLOCK »- EEDEElEIzlOs] < ID Q D G D Q D G E ] I f ) ~ q m <0 I S > E m E m n q [ ~ r ~ | [ 439 11 E E m E m c...
  • Page 429 ILLUM ILLUM ILLUM ILLUM ILLUM IL L U M T E M P B A T T IL L U M qQQ& S E R V IC E ENGINE B R A K E S O O N - 1 8 33 | □...
  • Page 430 CONVENIENCE CENTER - 4 1 9 .5 B R N /W H T - 4 5 6 .5 T A N /B L K l/P JU N CTIO N BLOCK 4201 |4 5 1 | 4341 43 7 | I » <...
  • Page 431 ILLUM ILLUM ILLUM ILLUM RIGHT TURN LEFT TURN dSXb SEAT BELT HIGH BEAM I 8 I 11501 25 | H a n D D H E]nU E \ 1 3 0 | 1 39 1 □ □ [ M I 1 15 | □...
  • Page 432 BUJ/tR CONVENIENCE □ □ □ □ CENTER 4 3 7 .8 BRN--------- □ □ □ □ 4 1 9 .5 BRN/WHT- 1 5 0 3 . 0 BLK - H AZAR D G*°]' E 3 150 3 0 BLK ■ FLASHER C H EI2 C Z D .
  • Page 433 CHECK ENGINE RIGHT TURN HIGH BEAM -j 2 2 6 1 □ { 3 7 6 ] TRIP SW ITCHES 1 2 0 6 5 5 4 7 l/P CLUSTER » < “ CONN r* eg «- [55«J □ □ m 3 □...
  • Page 434 FUSE BLOCK FRONT REAR AUDIO DOME LAM P DOME LAM P BUZZER LEFT HAND DOOR JA M B SWITCH DOME LAMPS SECTION F PAGE 56 12004148...
  • Page 435 2973324 2973324 "1 40 .8 ORN FRONT REAR READING FRONT READING LAMPS >* DOME LAMPS LAMPS 4 0 .8 ORN 152 .8 BLK 156-.8WHT----- — | 56-.8 WHT ENT' c m /i 90735 2973324 2973324 2973324 40-.8 ORN <o oo .
  • Page 436 CIGARETTE , r J U U ' i LIGHTER 8 8 GRA 1 2 0048 85 < ” | (B a i m m j E 12041296 L .fl) (g ) □ 1 2 0048 86 C D (8 ID 09. —...
  • Page 437 SLIDING SIDE DOOR STEPWELL DOME LAMP REAR REAR DOOR JAMB SWITCH LEFT HAND DOOR JAMB LIGHTING PACKAGE (RPO TR9) SWITCH 628887 2 SECTION F-P A G E 59...
  • Page 438 9 . 8 B R N - 4 0 .8 ORN • 8 9 0 0 4 4 4 RIGHT RIGHT REAR 8 9 0 0 4 4 4 TREBLE REAR SPEAKER IN-DOOR SPEAKER ANTENNA - 1 1 5 - .8 L T B L U - - 4 6 .8 DK BLU —...
  • Page 439 8 9 0 0 4 4 4 RIGHT FRONT SPEAKER HEATER 1 2 0 0 4 5 4 4 -2 01 .8 TAN - CNT LP -1 1 8 8 G R A ----- A U D BUZZER -1 17 8D K GRN- ALARM -2 0 0 .8 LT GRN - SPLICE...
  • Page 440 167-2.0 TAN _______ 167-2.0 TAN ------------ 6 6 6 2.0 DK BLU . WITH POWER 166 2.0 DK BLU/WHT 166-2.0 DK BLU/WHT MIRRORS ONLY 76 -2.0 PNK ------------ - 76 2 .0 PNK ------------- RPOD48 1 2 0 0 4 1 4 0 R.H.
  • Page 442 FRONT 282 .2 YEL ' TILT 283- 2 LT BLU MOTOR 12 0521 09 fe m e t c ir c u it FORE/AFT 284 ■ J BREAI BREAKER 2 8 4 .2 LT GRN UP/DOWN q H © i—1 MOTOR 28 5- 2 TAN ---- 12 0521 10...
  • Page 443 39 8 PNK/BLK AU D IO BUZZER ALARM HEADLAMP IGNITION BATTERY GRQUNO SAFETY BELT LAMP SAFETY BELT BUZZER SEAT BELT RETRACTOR SWITCH IGN/GAUGES 20 AMP SEAT BELT WARNING BUZZER SECTION F-P A G E 65...
  • Page 444 DOWN L -D .889! RIGHT LEFT R.H. MIRROR SWITCH 81-.5 W H T. >81-.5 WHT 8 9 .5 LT GRN 8 9 .5 LT GRN- ■88 .5 YEL----- 8 8 .5 YEL------ ■150 .5 BLK 82- 5 LT BLU 82- 5 LT BLU------- 8 8 9 .5 PPL/WHT 8 8 9 .5 PPL/WHT - 8 8 1 .5 RED/WHT -...
  • Page 445 VISOR VANITY MIRROR 4 0 .5 ORN 29 7 7 2 5 3 8 9 0 0 4 2 0 E E Q 0 13 El 0 E E □ B E S 0 4 0 .5 ORN - f ® [D □...
  • Page 446 W INDSHIELD W ASHER PUMP ID B IS ID IS 13 0 152-3.0 BLK SHEET M ETAL GROUND WIPER WASHER. DIMMER SW . (COLUMN MOUNTED) 1 2 0 1 0 4 2 9 1 2 0 4 1 1 5 8 1 2 0 4 1 4 2 4 CONN &...
  • Page 447 W INDSHIELD W ASHER PUMP 1 2 0 2 0 5 9 9 TO RH TO RH HEADLAMP PARKLAMP 152 3.0 BLK SPLICE 152 SHEET M ETAL PARK SW GROUND PULSE WIPER M OTOR 12 0156 64 PULSE WIPER, W ASH ER /D IM M ER SW (CO LUM N M OUNTED) 98 .8 ORN - 91 .8 GRA •...
  • Page 448 1 2 0 0 4 8 8 8 “ 00 (S U ) C D □ B (D E •ATT «GN . i —rn n —o SHUNTS SHUNTS ( J o in Roil [ r fo T l 20*1 IGN/GAUGES * V c s y ^ g 1 t e r 1 20 AMP...
  • Page 449 R.H. SIDE MARKER LAMP BACKUP R.H. BACKUP LA M P SW ITCH LA M P TAIL (AU TO TR AN S.) LAMP ■ S -1 5 1 .8 BLK GROM M ET l/P JUNCTION 1 2 0 4 6 5 5 1 r •...
  • Page 450 HEAD, PANEL & DOME R.H. TAIL. STOP. & LAMPS SWITCH DIRECTIONAL LAMP © R.H. LAMP GROUND BODY CONN CONN SPLICE 9 - 9 .8 BRN TO FRONT LAMPS LICENSE LAMP TC PANEL LAMP DIMMER SW. 1 2 0 4 5 5 5 1 t GROMMET C D B ID ID...
  • Page 451 HEAD. PANEL & DOME LAMPS SWITCH TO R.H. SIDE MARKER LAMP TO TAIL LAMP GROMMET 12 03 4 0 6 1 1 2 0 4 5 6 5 1 BACK- UPk R.H. LAMP LAMP SIDE » GROUND MARKER LP TAIL »...
  • Page 452 47 -3 .0 DK BLU SPLICE 18 1 2 0 1 5 3 4 5 BODY ■ 2 2 -2 .0 WHT - CONN SPLICE 1 9 r-. |J 4 7 -2 .0 DK BLU - C D 01 j| - 9 8 BRN 9 .8 BRN -------- -1 8 .8 YEL...
  • Page 454 CHEVROLET...