(17) Refer to Wiper On/Off Relay in the Diagno-
sis and Testing section of this group. If the wiper
on/off relay tests OK, go to Step 18. If the wiper
on/off relay does not test OK, replace the faulty wiper
on/off relay.
(18) Refer to Wiper High/Low Relay in the Diag-
nosis and Testing section of this group. If the wiper
high/low relay tests OK, replace the faulty wind-
shield wiper motor. If the wiper high/low relay does
not test OK, replace the faulty wiper high/low relay.
REAR WIPER SYSTEM
For complete circuit diagrams, refer to Wipers in
the Contents of Group 8W - Wiring Diagrams.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS,
REFER
TO
GROUP
8M
-
PASSIVE
RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING
WHEEL,
STEERING
COLUMN,
OR
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
(1) Check that the interior lighting switch on the
control stalk of the left multi-function switch is not
in the dome lamp disable position. With all four
doors and the liftgate closed, open the liftgate flip-up
glass. The interior lamps should light. Close all four
doors, the liftgate and the liftgate flip-up glass. Note
whether the interior lamps remain lighted. They
should turn off after about thirty seconds. If OK, go
to Step 2. If not OK, go to Step 9.
(2) Check the fused B(+) fuse in the junction block.
If OK, go to Step 3. If not OK, repair the shorted cir-
cuit or component as required and replace the faulty
fuse.
(3) Check for battery voltage at the fused B(+) fuse
in the junction block. If OK, go to Step 4. If not OK,
repair the open fused B(+) circuit to the Power Dis-
tribution Center (PDC) fuse as required.
(4) Check the fused ignition switch output (run/ac-
cessory) fuse in the junction block. If OK, go to Step
5. If not OK, repair the shorted circuit or component
as required and replace the faulty fuse.
(5) Turn the ignition switch to the On position.
Check for battery voltage at the fused ignition switch
output (run/accessory) fuse in the junction block. If
OK, turn the ignition switch to the Off position and
go to Step 6. If not OK, repair the open fused ignition
switch output (run/accessory) circuit to the ignition
switch as required.
(6) Disconnect and isolate the battery negative
cable. Disconnect the instrument panel wire harness
connector from the wiper and washer (right multi-
function) switch connector receptacle. Reconnect the
battery negative cable. Turn the ignition switch to
the On position. Check for battery voltage at the
fused ignition switch output (run/accessory) circuit
cavity of the instrument panel wire harness connec-
tor for the wiper and washer switch. If OK, go to
Step 7. If not OK, repair the open fused ignition
switch output (run/accessory) circuit to the junction
block fuse as required.
(7) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Refer to Wiper and Washer Switch in the Diagno-
sis and Testing section of this group. If the wiper and
washer switch tests OK, reconnect the instrument
panel wire harness connector to the wiper and
washer switch connector receptacle and go to Step 8.
If the wiper and washer switch does not test OK,
replace the faulty wiper and washer switch.
(8) Remove the liftgate inner trim panel. Discon-
nect the liftgate wire harness connector from the rear
wiper motor module connector receptacle. Check for
continuity between the ground circuit cavity of the
liftgate wire harness connector for the rear wiper
motor module and a good ground. There should be
continuity. If OK, go to Step 9. If not OK, repair the
open ground circuit to ground as required.
(9) Check
for
continuity
between
the
liftgate
flip-up glass ajar switch sense circuit cavity of the
liftgate wire harness connector for the rear wiper
motor module and a good ground. There should be
continuity with the liftgate flip-up glass open, and no
continuity with the liftgate flip-up glass closed. If
OK, go to Step 10. If not OK, repair the liftgate
flip-up glass ajar circuit as required.
(10) Reconnect the battery negative cable. Check
for battery voltage at the fused B(+) circuit cavity of
the liftgate wire harness connector for the rear wiper
motor module. If OK, go to Step 11. If not OK, repair
the open fused B(+) circuit to the junction block fuse
as required.
(11) Turn the ignition switch to the On position.
Turn the rear wiper switch to the Delay position.
Check for battery voltage at the rear wiper motor
intermittent control circuit cavity of the liftgate wire
harness connector for the rear wiper motor module.
If OK, go to Step 12. If not OK, repair the open rear
wiper motor intermittent control circuit to the wiper
and washer switch as required.
(12) Turn the rear wiper switch to the On position.
Check for battery voltage at the rear wiper motor
control circuit cavity of the liftgate wire harness con-
nector for the rear wiper motor module. If OK,
replace the faulty rear wiper motor module. If not
OK, repair the open rear wiper motor control circuit
to the wiper and washer switch as required.
8K - 10
WIPER AND WASHER SYSTEMS
WJ
DIAGNOSIS AND TESTING (Continued)