Grand Cherokee 2WD V8-5.2L VIN Y (1998)
Wiper Switch: Testing and Inspection
FRONT
Perform the diagnosis for the windshield wiper system and/or washer system as described before testing the multi-function switch.
WARNING: ON VEHICLES EQUIPPED WITH AIR-BAGS, REFER TO AIRBAGS SYSTEMS BEFORE ATTEMPTING ANY STEERING
WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE
PROPER PRECAUTIONS 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 from the multi-function switch.
Multi-Function Continuity
3. Using an ohmmeter, perform the switch continuity checks at the switch terminals as shown in the Multi-Function Switch Continuity chart.
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.
REAR
Perform the diagnosis for the rear wiper system and/or washer system as described before testing the rear wiper and washer switch.
WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, REFER TO AIRBAGS SYSTEMS BEFORE ATTEMPTING ANY STEERING
WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE
PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIR-BAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
1. Remove the rear wiper and washer switch from the instrument panel.
2. Using an ohmmeter, check the rear wiper and washer switch continuity at the switch terminals as follows:
a. With the switch in the Off position, there should be no continuity between any two switch terminals.
b. With the switch knob depressed in the Wash position, there should be continuity between the fused ignition switch output circuit and the rear
washer motor control circuit terminals.
c. With the switch in the Intermittent position, there should be continuity between the fused ignition switch output circuit and the rear wiper
motor control (intermittent) circuit terminals.
d. With the switch in the On position, there should be continuity between the fused ignition switch out-put circuit and the rear wiper motor
control circuit terminals.
3. If the switch fails any of the continuity checks, replace the faulty switch. If the switch is OK, repair the rear wiper system and/or washer system
wire harness circuits as required.