Testing

WASHER SYSTEM
The diagnosis found here addresses an electrically inoperative front washer system. If the front washer pump/motor operates, but no washer fluid is emitted from the washer nozzle, be certain to check the fluid level in the reservoir. Also clean and inspect the front washer system components as required. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, DRIVER AIRBAG, PASSENGER AIRBAG, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

1. Turn the ignition switch to the On position. Move the right multi-function switch control stalk to the Low or High continuous wipe position. Check whether the front wiper system operates. If OK, go to Step 2. If not OK, repair the front wiper system as required before you proceed with front washer system diagnosis.
2. Turn the ignition switch to the Off position. Disconnect and isolate the battery negative cable. Disconnect the headlamp and dash wire harness connector for the front washer pump/motor from the washer pump/motor connector receptacle. Check for continuity between the ground circuit cavity of the headlamp and dash wire harness connector for the front washer pump/motor and a good ground. There should be continuity. If OK, go to Step 3. If not OK, repair the open ground circuit to ground (G102) as required.
3. Reconnect the battery negative cable. Turn the ignition switch to the On position. While pulling the right multi-function switch control stalk toward the steering wheel to close the washer switch, check for battery voltage at the washer pump control switch output circuit cavity of the headlamp and dash wire harness connector for the front washer pump/motor. If OK, replace the faulty front washer pump/motor. If not OK, go to Step 4.
4. Turn the ignition switch to the Off position. Disconnect and isolate the battery negative cable. Disconnect the body wire harness connector for the right multi-function switch from the switch connector receptacle. Check for continuity between the washer pump control switch output circuit cavity of the headlamp and dash wire harness connector for the front washer pump/motor and a good ground. There should be no continuity. If OK, go to Step 5 If not OK, repair the shorted washer pump control switch output circuit between the front washer pump/motor and the right multi-function switch as required.
5. Check for continuity between the washer pump control switch output circuit cavities of the headlamp and dash wire harness connector for the front washer pump/motor and the body wire harness connector for the right multi-function switch. There should be continuity. If OK, replace the faulty right multi-function switch. If not OK, repair the open washer pump control switch output circuit between the front washer pump/motor and the right multi-function switch as required.