Chrysler 300M 1999 Manual page 443

TEST 12A
CONTINUED - REPAIRING REAR WINDOW DEFOGGER
TEST 12A
CONTINUED FROM
THE PREVIOUS
PAGE.
NOTE: DO NOT
LEAVE JUMPER
CONNECTED FOR A
LONG PERIOD OF
TIME.
DISCONNECT THE
JUMPER WIRE.
THE REAR DEFOGGER
RELAY CONTROL CKTS
(CAVITIES 2 AND 4).
FIG. 1
KEY OFF.
DISCONNECT THE BODY
CONTROL MODULE C4
HARNESS CONNECTOR.**
SEE GENERAL INFO 4.0
USING AN OHMMETER,
MEASURE BETWEEN
GROUND AND THE REAR
DEFOGGER RELAY
CONTROL CKT. FIG. 1
*Perform Verification TEST VER-2A.
CONNECT A JUMPER
WIRE BETWEEN THE
FUSED B(+) AND REAR
DEF RELAY OUTPUT
CKTS. FIG. 1
USING A VOLTMETER,
BACKPROBE THE REAR
DEFOGGER RELAY
OUTPUT CKT AT RIGHT
REAR GLASS GRID.
CONNECT A TEST
LIGHT BETWEEN THE
FUSED B(+) AND...
NOTE: MAKE SURE REAR
DEFROSTER SWITCH IS
STILL TURNED ON BY
SEEING LED INDICATOR
ON THE SWITCH.
CONNECT A JUMPER
WIRE FROM REAR
DEFOGGER RELAY
CONTROL CIRCUIT TO
GROUND. FIG. 2
**Check connectors - Clean / repair as necessary.
433
IS THE VOLTAGE NO
ABOVE 10.0 VOLTS?
YES
DOES THE TEST
LIGHT ILLUMINATE YES
WHEN THE SWITCH IS
ON?
NO
IS THE RESISTANCE NO
BELOW 5.0 OHMS?
YES
REPAIR THE OPEN REAR
DEFOGGER RELAY
OUTPUT CIRCUIT
BETWEEN THE RELAY
AND REAR WINDOW.*
REPLACE THE REAR
WINDOW DEFOGGER
RELAY.*
REPAIR THE OPEN
REAR DEFOGGER
RELAY CONTROL
CIRCUIT.*
REPLACE THE BODY
CONTROL MODULE.*
M
A
N
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P
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R
A
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R
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C
O
N
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O
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