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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