Washer System

WINDSHIELD WASHER SYSTEM
The diagnosis found here addresses an inoperative windshield washer system or wipe-after-wash feature. 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.

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, REFER TO AIR BAGS AND SEAT BELTS/AIR BAGS BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. 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. Turn the windshield wiper switch to the Low or High speed position. Check whether the windshield wipers operate. If OK, go to Step 2. If not OK, refer to Windshield Wiper System Testing and Inspection.
2. Turn the wiper switch to the OFF position. Actuate the windshield washer switch. The washer pump should operate and the windshield wipers should operate for about three sweep cycles after the switch is released before they park. If the wipers are OK, but the washers are not, go to Step 5. If the washers are OK, but the wipers are not, go to Step 5.
3. Turn the ignition switch to the OFF position. Disconnect and isolate the battery negative cable. Disconnect the left headlamp and dash wire harness connector from the front washer pump connector receptacle. Check for continuity between the ground circuit cavity of the left headlamp and dash wire harness connector for the front washer pump and a good ground. There should be continuity. If OK, go to Step 4. If not OK, repair the open ground circuit to ground as required.
4. Reconnect the battery negative cable. Turn the ignition switch to the ON position. With the windshield washer switch activated, check for battery voltage at the washer pump control switch output circuit cavity of the left headlamp and dash wire harness connector for the front washer pump. If OK, replace the faulty washer pump. If not OK, repair the open washer pump control switch output circuit to the wiper and washer (right multi-function) switch as required.
5. Turn the ignition switch to the OFF position. Disconnect and isolate the battery negative cable. Disconnect the 22-way instrument panel wire harness connector from the Body Control Module (BCM) connector receptacle. Reconnect the battery negative cable. Turn the ignition switch to the ON position. With the windshield washer switch activated, check for battery voltage at the washer pump control switch output circuit cavity of the 22-way instrument panel wire harness connector for the BCM. If OK, use a DRB scan tool and the proper Diagnostic Procedures to diagnose the BCM. If not OK, repair the open washer pump control switch output circuit to the wiper and washer (right multi-function) switch as required.

REAR WASHER SYSTEM
The diagnosis found here addresses an inoperative rear washer system. 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.

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, REFER TO AIR BAGS AND SEAT BELTS/AIR BAGS BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. 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. Turn the rear wiper switch to the ON position. Check whether the rear wiper system is operating. If OK, go to Step 2. If riot OK, refer to Rear Wiper System in the Diagnosis and Testing.
2. Turn the ignition switch to the OFF position. Disconnect and isolate the battery negative cable. Disconnect the left headlamp and dash wire harness connector from the rear washer pump connector receptacle. Check for continuity between the ground circuit cavity of the left headlamp and dash wire harness connector for the rear washer pump and a good ground. There should be continuity. If OK, go to Step 3. If not OK, repair the open ground circuit to ground as required.
3. Connect the battery negative cable. Turn the ignition switch to the ON position. With the rear washer switch actuated, check for battery voltage at the rear washer motor control circuit cavity of the left headlamp and dash wire harness connector for the rear washer pump. If OK, replace the faulty rear washer pump. If not OK, repair the open rear washer motor control circuit to the wiper and washer (right multi-function) switch as required.