Wiper Switch And Washer Switch - Jeep 1997 Grand Cherokee Service Manual

ZG
DIAGNOSIS AND TESTING (Continued)
zero ohms. If OK, go to Step 4. If not OK, repair the
ground circuit as required.
(4) Connect the battery negative cable. Turn the
ignition switch to the On position. Depress the
washer switch. Measure the voltage at the washer
switch output circuit cavity of the front washer pump
wire harness connector. The meter should read bat-
tery voltage. If OK, replace the faulty pump. If not
OK, repair the open circuit as required.
(5) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Unplug the white 24-way wire harness connector
from the Body Control Module (BCM). Connect the
battery negative cable. Turn the ignition switch to
the On position. Depress the washer switch. Check
for battery voltage at the washer switch output cir-
cuit cavity of the white 24-way BCM wire harness
connector. If OK, see the Intermittent Wipe Relay
diagnosis in this group. If not OK, repair the open
circuit as required.
REAR
The diagnosis found here addresses an inoperative
washer pump. If the washer pump operates, but no
washer fluid is emitted from the washer nozzles, be
certain to check the fluid level in the reservoir. Check
for ice or other foreign material in the reservoir, and
for pinched, disconnected, broken, or incorrectly
routed washer system plumbing. For circuit descrip-
tions 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
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) Turn the ignition switch to the On position.
Place the rear wiper/washer switch in the Wipe posi-
tion. Check whether the rear wiper is operating. If
OK, go to Step 2. If not OK, see the Wiper System
diagnosis in this group.
(2) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Unplug the rear washer pump wire harness connec-
tor. Measure the resistance between the ground cir-
cuit cavity of the rear washer pump wire harness
connector and a good ground. The meter should read
zero ohms. If OK, go to Step 3. If not OK, repair the
circuit to ground as required.
(3) Connect the battery negative cable. Turn the
ignition switch to the On position. Depress the rear
GROUP 8M - PASSIVE
STEERING COLUMN,
WIPER AND WASHER SYSTEMS
washer switch. Measure the voltage at the rear
washer motor control circuit cavity of the rear
washer pump wire harness connector. The meter
should read battery voltage. If OK, replace the faulty
pump. If not OK, repair the open circuit as required.

WIPER SWITCH AND WASHER SWITCH

FRONT
Perform the diagnosis for the windshield wiper sys-
tem and/or washer system as described in this group
before testing the multi-function switch. For circuit
descriptions and diagrams, see 8W-53 - Wipers in
Group 8W - Wiring Diagrams.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER
RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
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) Disconnect and isolate the battery negative
cable.
(2) Unplug the multi-function switch wire harness
connector as described in this group.
(3) Using an ohmmeter, perform the switch conti-
nuity checks at the switch terminals as shown in the
Multi-Function Switch Continuity chart (Fig. 2).
(4) If the switch fails any of the continuity checks,
replace the faulty switch. If the switch is OK, repair
the wiper system and/or washer system wire harness
circuits as required.
OR
REAR
Perform the diagnosis for the rear wiper system
and/or washer system as described in this group
before testing the rear wiper and washer switch. For
circuit descriptions and diagrams, see 8W-53 - Wip-
ers in Group 8W - Wiring Diagrams.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER
RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
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) Remove the rear wiper and washer switch as
described in this group.
TO GROUP 8M -
STEERING COLUMN,
TO GROUP 8M -
STEERING COLUMN,
8K - 7
PASSIVE
OR
PASSIVE
OR