Jeep 200 Cherokee Service Manual page 464

XJ
DIAGNOSIS AND TESTING (Continued)
(4) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Check for continuity between the ground circuit cav-
ity of the wiper switch wire harness connector and a
good ground. There should be continuity. If OK,
replace the faulty switch. If not OK, repair the open
circuit to ground as required.
(5) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Remove the windshield wiper and washer switch and
check the switch continuity. See Wiper Switch and
Washer Switch in the Diagnosis and Testing section
of this group for the procedures. If OK, go to Step 6.
If not OK, replace the faulty switch.
(6) Unplug the windshield wiper motor wire har-
ness connector. Check for continuity between the
ground circuit cavity in the body half of the wiper
motor wire harness connector and a good ground.
There should be continuity. If OK, go to Step 7. If not
OK, repair the open circuit to ground as required.
(7) Connect the battery negative cable. Turn the
ignition switch to the On position. Check for battery
voltage at the fused ignition switch output (run/acc)
circuit cavity in the body half of the wiper motor wire
harness connector. If OK, go to Step 8. If not OK,
repair the open circuit to the junction block as
required.
(8) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
With the windshield wiper and washer switch wire
harness connector still unplugged, check the cavities
for each of the following circuits in the body half of
the wiper motor wire harness connector for continu-
ity to ground. In each case, there should be no conti-
nuity. If OK, go to Step 9. If not OK, repair the short
circuit as required.
• Wiper park switch sense
• Wiper switch low speed output
• Wiper switch high speed output.
(9) Check for continuity between the cavities in
the body half of the wiper motor wire harness con-
nector and the cavities in the windshield wiper and
washer switch wire harness connector for each of the
following circuits. In each case, there should be con-
tinuity. If OK, replace the faulty wiper motor. If not
OK, repair the open circuit as required.
• Wiper park switch sense
• Wiper switch low speed output
• Wiper switch high speed output.
REAR
For circuit descriptions and diagrams, refer to
8W-53 - Wipers in Group 8W - Wiring Diagrams.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER TO
RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
GROUP 8M - PASSIVE
WIPER AND WASHER SYSTEMS
STEERING WHEEL,
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 the fuse in the junction block. If OK, go
to Step 2. If not OK, repair the shorted circuit or
component as required and replace the faulty fuse.
(2) Disconnect and isolate the battery negative
cable. Remove the accessory switch bezel and unplug
the wire harness connector from the rear wiper and
washer switch. Connect the battery negative cable.
Turn the ignition switch to the On position. Check
for battery voltage at the fused ignition switch out-
put circuit cavity of the rear wiper and washer
switch wire harness connector. If OK, go to Step 3. If
not OK, repair the open circuit to the junction block
as required.
(3) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Check for continuity between the ground circuit cav-
ity of the rear wiper and washer switch wire harness
connector and a good ground. There should be conti-
nuity. If OK, go to Step 4. If not OK, repair the open
circuit to ground as required.
(4) Test the rear wiper and washer switch continu-
ity. See Wiper Switch and Washer Switch in the
Diagnosis and Testing section of this group for the
procedures. If OK, go to Step 5. If not OK, replace
the faulty switch.
(5) Remove the liftgate trim panel and unplug the
rear wiper motor wire harness connector. Connect
the battery negative cable. Turn the ignition switch
to the On position. Check for battery voltage at the
fused ignition switch output (run) circuit cavity of
the rear wiper motor wire harness connector. If OK,
go to Step 6. If not OK, repair the open circuit to the
junction block as required.
(6) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Check for continuity between the ground circuit cav-
ity of the rear wiper motor wire harness connector
and a good ground. There should be continuity. If
OK, go to Step 7. If not OK, repair the open circuit to
ground as required.
(7) Check for continuity between the rear wiper
motor control circuit cavity of the rear wiper motor
wire harness connector and a good ground. There
should be no continuity. If OK, go to Step 8. If not
OK, repair the short circuit as required.
(8) Check for continuity between the rear wiper
motor control circuit cavities of the rear wiper motor
wire harness connector and the rear wiper and
washer switch wire harness connector. There should
STEERING COLUMN,
8K - 5
OR