Cruise Master Diagnosis Chart - Pontiac TRANS AM 1977 Service Manual

9-1 4
1 9 7 7 PONTIAC SERVICE MANUAL
(
PRELIMINARY
NYECTION TOMPLETE CHECK
r
s n a r r o
IF CHECK
1 DOES NOT SOLVE THE
PROBLEM
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(
1
UNPI.UG TWO TERMINAL CONNECTOR A T REGULATOR
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2 RECONNECT CONNECTOR AS PER F I G
2
[WHITE WlRE PLUGGED TO HOLD TERMINAL.
BROWNIWHITE WlRE NOT CONNECTED1
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3
TURN "ON" IGNITION KEY I D 0 N O T START ENGINE1
A N 0 DEPRESS ENGAGE SWITCH HALFWAY A N D H O L D
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a CHECK FUSE AND BRAKE SWITCH ADJUSTMENT CHECK GROUND
WlRE F R O M REGULATOR O N " A " CAR ISEE ELECTRICAL SYSTEM
CHECKOUT)
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NORMAL RESULT
REGULATOR ENGAGES W l T H AUDIBLE "THUNK"
WlTH CAR I N "PARK". START ENGINE A N D
DEPRESS ENGAGE SWITCH H A L F WAY
ENGINE ACCELERATES
DISCONNECT ORIFICE TUBE HOSE
AT REGULATOR AND PLUG I T
4
-
CHECK BROWNiWHlTE STRIPE WlRE BY EITHER OF THE
FOLLOWING METHODS
ENGINE RUNNING ENGAGE
1 FOR OHMMETER CHECK. REFER T O ELECTRICAL
SYSTEM CHECKOUT
SWITCH DEPRESSED H A L F WAY
2 WlTH IGNITION "ON". VOLTMETER MUST READ
BATTERY VOLTAGE A T THE DISCONNECTED
BROWNIWHITE WlRE TERMINAL A T REGULATOR
CONNECTOR
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ENGINE DOESNOT ACCELERATE
NORMAL RESULT
V A C U U M L E A K O R R E S T R I C T I O N I S
I F 1 or 2 ARE OK.
I N O l C A T E D D I S C O N N E C T LARGE HOSE
REPLACE REGULATOR ENGINE ACCELERATES CONNECTED T O THE REGULATOR ANDCHECK
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F O R VACUUM A T REGULATOR FITTING.
J
N O VACUUM
REMOVE ENGINE M A N I F O L D VACUUM SUPPLY
HOSE A T REGULATOR CHECK FOR VACUUM
AT HOSE
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NO VACUUM
CHECK VACUUM SUPPLY HOSE A N D
VACUUM F I T T I N G A T ENGINE
b
CHECK REGULATOR CIRCUIT BETWEEN "HOLD" BLADE
TERMINAL A N D GROUND I T SHOULD READ
4
6 OHMS'
c CHECK ENGAGEMENT SWITCH ISEE ELECTRICAL SYSTEM
CHECKOUT1
d CHECK WHITE WlRE A T REGULATOR ASSEMBLY FOR BATTERY
VOLTAGE I12 VOLTS1 W l T H ENGAGEMENT SWITCH DEPRESSED
H A L F WAY I I G N I T I O N SWITCH "0N"I'
I F A L L ABOVE CONDITIONS ARE OK A N D N O "THUNK" IS H E A R D
REPLACE REGULATOR
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VACUUM
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1
a, REINSTALL L A R G E HOSE A T REGULATOR
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b
REMOVE HOSE AT SERVO U N I T CHECK FOR VACUUM A T
E N D OF HOSE (ENGAGE SWITCH DEPRESSEDHALFWAY
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I I
REGULATOR
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b
CHECK BRAKE RELEASE V A L V E A N D
1
HOSE.
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Fig.
9-1 3 Cruise Master Diagnosis Chart 2