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I
CHASSIS ELECTRICAL
8-7 1
NOTE: WHEN DIAGNOSING A WARNING SYSTEM F A I L U R E A N D THE
SYSTEM AUTOMATICALLY SHUTS OFF BECAUSE O F THE
4 - 8
SECOND TIMER. A M I N I M U M OF 3 MINUTES MUST BE ALLOWED
BETWEEN THE DIAGNOSTIC STEPS TO ALLOW THE TlMER TO
RESET ( K E Y I N OFF POSITION DURING THIS PERIOD).
REMINDER L l G H T NEVER ON
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BUZZER N O R M A L
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I. CHECK CONNECTION OF L A M P GROUND
CIRCUIT TO INSTRUMENT PANEL JUMPER
2 . CHECK LAMP BULB
3.
CONNECT SHORT TESTER TO L A M P
CIRCUIT (YELLOW) A T JUNCTION OF
YELLOW A N D BLACK Wl RES (POINT A)
A N D TO BODY GROUND
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TEST L I G H T O F F
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TEST L I G H T ON
REPAIR YELLOW WIRE
REPAIR BLACK WIRE
REMINDER LIGHT/BUZZER
NEVER ON
2 . CHECK INSTRUMENT PANEL JUMPER
GROUND
3. CONNECT SHORT TESTER TO TIMER
FEED CIRCUIT (PINK) A T TlMER
TEST LIGHT OFF
TEST L I G H T ON
REPAIR PlNK WlRE
CONNECT SHORT TESTER
TO TlMER OUTPUT
CIRCUIT ( A T BROWN A N D
YELLOW WIRES) A N D TO
TEST L l G H T OFF
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I
TEST L l G H T ON
1
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REPLACE TlMER
CHECK CONTINUITY
BETWEEN GROUND
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T E R M I N A L A N D BODY
GROUND
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r
1
L l G H T A N D BUZZER ON CONTINUOUSLY-
BUT, BUCKLING BELT W I L L TURN
OFF BUZZER
CONNECT SHORT TESTER
BETWEEN
THE PlNK A N D BLACK WIRES A T
TEST L I G H T ON
TEST L I G H T OFF
REMINDER L I G H T N O R M A L
BUZZER NEVER ON
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DISCONNECT HARNESS T O DRIVER'S
BUCKLE SWITCH A T JUNCTION
WlTH INSTRUMENT PANEL JUMPER
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TURN IGNITION KEY OFF
WAIT THREE ( 3 ) MINUTES
TURN KEY ON
'
BUZZER INOPERATIVE
-
BUZZER OPERATES
r
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I.
CHECK BUZZER BY
APPLYING 1 2 VOLT
1
POWER SOURCE
TO
TERMINALS A N D
REPLACE I F DEFECTIVE
2.CONNECT SHORT
TESTER TOHARNESS AT
BUZZER (BROWN A N D
WHITE WIRES) A N D
BODY GROUND
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TEST L I G H T OFF
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TEST L I G H T ON
1
TEST L l G H T O F F
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l
I. CHECK L l G H T A N D
2 . CHECK FOR BREAK I N
L A M P A N D BUZZER
REPAIR BROWN
1
-
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TEST L l G H T ON
ECONNECT BODY HARNESS
A T INSTRUMENT PANEL
JUMPER A N D DISCONNECT
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L E A D A T THE DRIVERS
BUZZER OPERATES
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l
REPLACE BUCKLE
- 1
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REPAIR(BLACK) GROUND WIR
CONNECTION TO BODY
1144
Fig. 8-90 Seat Belt Diagnosis
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