Chrysler New Yorker. Manual — part 458

TEST 12A

REPAIRING REAR WINDOW DEFOGGER

Perform TEST 1A Before Proceeding

FIG. 1

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TEST 12A

REPAIRING REAR WINDOW DEFOGGER

Perform TEST 1A Before Proceeding

*Perform Verification TEST VER-2A.

**Check connectors - Clean / repair as necessary.

KEY ON.

ARE ANY MANUAL

WITH THE DRB ENTER

TEMP CONTROL

YES

PERFORM TEST

START TEST 12A.

"BODY COMPUTER"

TROUBLE CODES

1A.

AND READ THE

PRESENT?

DTC’S.

NO

WITH THE DRB ENTER

PRESS AND HOLD THE

"SENSORS" AND READ

REAR DEFOGGER

IS THE VOLTAGE

NO

REPLACE THE

THE "MODE SWITCH

BUTTON AND OBSERVE

APPROXIMATELY 0.25

A/C-HEATER CONTROL

MUX" VOLTAGE.

THE "MODE SWITCH

VOLTS?

HEAD.*

MUX" VOLTAGE.

YES

N OHMMETER REPAIR

THE OPEN

BACKPROBE

IS THE RESISTANCE

NO

GROUND CIRCUIT TO

TURN IGNITION OFF.

G

ND

BELOW 5.0 OHMS?

THE REAR WINDOW

DEFOGGER

GLASS

ELEMENTS.*

YES

TURN IGNITION ON.

USING A VOLTMETER,

REPAIR THE REAR

TURN THE REAR

BACKPROBE THE REAR

IS THE VOLTAGE

YES

WINDOW DEFROSTER

WINDOW DEFOGGER

DEFOGGER RELAY

ABOVE 10.0 VOLTS?

BROKEN ELEMENT(S)

SWITCH ON.

OUTPUT CKT AT RIGHT

AS NECESSARY.*

REAR GLASS GRID.

NO

DISCONNECT THE REAR

USING A VOLTMETER,

WINDOW DEFOGGER

MEASURE THE FUSED

IS THE VOLTAGE

NO

PERFORM TEST

RELAY HARNESS

B(+) CIRCUITS.

ABOVE 10.0 VOLTS?

12B.

CONNECTOR.**

SEE GENERAL INFO 4.0

FIG. 1

YES

CONTINUE TEST
12A ON THE NEXT

PAGE.

USING A

,

THE

DEFOGGER ROU
CKT AT LEFT REAR

OF GRID.

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TEST 12A

CONTINUED - REPAIRING REAR WINDOW DEFOGGER

FIG. 1

FIG. 2

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TEST 12A

CONTINUED - REPAIRING REAR WINDOW DEFOGGER

*Perform Verification TEST VER-2A.

**Check connectors - Clean / repair as necessary.

TEST 12A

CONNECT A JUMPER

CONTINUED FROM WIRE

BETWEEN THE

THE PREVIOUS FUSED B(+)

AND REAR

PAGE.

DEF RELAY OUTPUT

CKTS. FIG. 1

NOTE:

DO NOT

USING A VOLTMETER,

REPAIR THE OPEN REAR

LEAVE JUMPER

BACKPROBE THE REAR

IS THE VOLTAGE

NO

DEFOGGER RELAY

CONNECTED FOR A

DEFOGGER RELAY

ABOVE 10.0 VOLTS?

OUTPUT CIRCUIT

LONG PERIOD OF

OUTPUT CKT AT RIGHT

BETWEEN THE RELAY

TIME.

REAR GLASS GRID.

AND REAR WINDOW.*

YES

DISCONNECT THE

CONNECT A TEST

JUMPER WIRE.

LIGHT BETWEEN THE
FUSED B(+) AND...

THE REAR DEFOGGER

NOTE: MAKE SURE REAR

DOES THE TEST

RELAY CONTROL CKTS

DEFROSTER SWITCH IS

LIGHT ILLUMINATE YES

REPLACE THE REAR

(CAVITIES 2 AND 4).

STILL TURNED ON BY

WHEN THE SWITCH IS

WINDOW DEFOGGER

SEEING LED INDICATOR

ON?

RELAY.*

FIG. 1

ON THE SWITCH.

NO

KEY OFF. CONNECT A JUMPER

DISCONNECT THE BODY

WIRE FROM REAR

CONTROL MODULE C4

DEFOGGER RELAY

HARNESS CONNECTOR.** CONTROL CIRCUIT TO
SEE GENERAL INFO 4.0

GROUND. FIG. 2

USING AN OHMMETER,

REPAIR THE OPEN

MEASURE BETWEEN

IS THE RESISTANCE

NO

REAR DEFOGGER

GROUND AND THE REAR

BELOW 5.0 OHMS?

RELAY CONTROL

DEFOGGER RELAY

CIRCUIT.*

CONTROL CKT. FIG. 1

YES

REPLACE THE BODY
CONTROL MODULE.*

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