Rear Window Defogger Relay Test; Repair Grid Lines, Terminals And Pigtails - Chrysler 2000 LHS Owner's Manual

8N - 4 ELECTRICALLY HEATED SYSTEMS
DIAGNOSIS AND TESTING (Continued)
POTENTIAL PROBLEM
NO PROBLEM. VOLTAGES AS
EXPECTED WITH THE SYSTEM
OFF.
NO PROBLEM. VOLTAGES AS
EXPECTED WITH THE SYSTEM
ON.
RELAY CONTACTS NOT CLOSING.
REPLACE RELAY.
WIRING OPEN BETWEEN BODY
CONTROL MODULE AND REAR
WINDOW DEFOGGER RELAY, OR,
DEFECTIVE BODY CONTROL
MODULE.
POOR CONNECTION BETWEEN
PIN 3 OF RELAY AND POSITIVE
CONNECTION ON REAR WINDOW
DEFOGGER GRID CIRCUIT.
POOR CONNECTION TO GROUND
ON NEGATIVE SIDE OF REAR
WINDOW DEFOGGER GRID.
POOR WIRING CONNECTION
BETWEEN PINS 1 TO 2 OF THE
REAR WINDOW DEFOGGER
RELAY.
OPEN FUSE OR OPEN WIRING
CONNECTION TO PIN 1 OF REAR
WINDOW DEFOGGER RELAY.
RELAY CONTACTS SHORTED.
REPLACE RELAY. REAR WINDOW
DEFOGGER WILL NOT TURN OFF.
SERVICE PROCEDURES
REPAIR GRID LINES, TERMINALS AND
PIGTAILS
The repair of the grid lines or the terminal is pos-
sible using the Mopar Repair Package or equivalent.
(1) Mask repair area so conductive epoxy can be
extended onto the line or the bus bar (Fig. 5).
(2) Follow instructions in repair kit for preparing
damaged area.

REAR WINDOW DEFOGGER RELAY TEST

SYSTEM
ON OR OFF
WITH
ENGINE
RUNNING
OFF
ON
ON
ON
ON
ON
ON
ON
OFF
VOLTAGE AT REAR WINDOW
DEFOGGER RELAY POINT TO
GOOD VEHICLE GROUND
1 2 3
MORE MORE
THAN THAN 0
11 11
MORE MORE MORE
THAN THAN THAN
11 11 11
MORE MORE
THAN THAN 0
11 11
MORE MORE
THAN THAN 0
11 11
MORE MORE MORE
THAN THAN THAN
11 11 11
MORE MORE MORE
THAN THAN THAN
11 11 11
MORE
THAN 0 0
11
0 0 0
MORE MORE MORE
THAN THAN THAN
11 11 11
(3) Remove package separator clamp and mix plas-
tic conductive epoxy thoroughly. Fold in half and cut
center corner to dispense epoxy.
(4) For grid line, mark off area to be repaired with
masking tape or a template (Fig. 5).
(5) Apply conductive epoxy through slit in masking
tape. Overlap both ends of the break by 19 mm (3/4
inch).
(6) For a terminal or pigtail replacement, mask
adjacent areas so epoxy can be extended onto line as
well as bus bar. Apply a thin layer of epoxy to area
where terminal was fastened and to adjacent line.
VOLTAGE AT
REAR WINDOW
DEFOGGER
GRID TO GOOD
VEHICLE
GROUND
4 A B
MORE
THAN 0
11
LESS MORE LESS
THAN THAN THAN
1.0 11 1.0
LESS
THAN 0
1.0
MORE
THAN 0
11
LESS
THAN 0
1.0
LESS MORE MORE
THAN THAN THAN
1.0 11 11
0 0
0 0
MORE MORE
THAN THAN
11 11
LH
0
0
0
0
0
0
0