Wiper System

Front

WARNING: ON VEHICLES EQUIPPED WITH AIR-BAGS, REFER TO AIRBAGS AND SEATBELTS/AIRBAGS BEFORE ATTEMPTING 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. Check the fuse in the fuse block module. If OK, go to Step 2. If not OK, replace the faulty fuse.
2. Unplug the windshield wiper/washer switch connector Turn the ignition switch to the Accessory or On position. Check for battery voltage at the fused ignition switch output (run/ACC) circuit cavity of the wiper/washer switch connector. If OK, go to Step 3. If not OK, repair the open circuit to the fuse block module as required.
3. If the vehicle is equipped with the intermittent wiper system and the problem being diagnosed involves only the pulse wipe, wipe-after-wash, or intermittent wipe modes, go to Step 4. If not, go to Step 5.
4. Turn the ignition switch to the Off position. Check for continuity between the ground circuit cavity of the wiper/washer switch connector 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. Check the windshield wiper/washer switch continuity as described. If OK, go to Step 6. If not OK, replace the faulty switch.
6. Unplug the windshield wiper motor connector Check for continuity between the ground circuit cavity in the body half of the wiper motor 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. Turn the ignition switch to the Accessory or On position. Check for battery voltage at the fused ignition switch output (run/ACC) circuit cavity in the body half of the wiper motor connector. If OK, go to Step 8. If not OK, repair the open circuit to the fuse block module as required.
8. Turn the ignition switch to the Off position. With the windshield wiper/washer switch connector still unplugged, check the cavities for each of the following circuits in the body half of the wiper motor connector for continuity to ground. In each case, there should be no continuity. 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. With the ignition switch still in the Off position, check for continuity between the cavities in the body half of the wiper motor connector and the cavities in the wiper/washer switch connector for each of the following circuits. In each case, there should be continuity 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

WARNING: ON VEHICLES EQUIPPED WITH AIR-BAGS, REFER TO AIRBAGS AND SEAT BELTS/AIRBAGS BEFORE ATTEMPTING 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. Check the fuse in the fuse block module. If OK, go to Step 2. If not OK, replace the faulty fuse.
2. Remove the rear wiper/washer switch and unplug the wiring connector. Turn the ignition switch to the On position. Check for battery voltage at the rear washer switch output circuit cavity of the rear wiper/washer switch connector. If OK, go to Step 3. If not OK, repair the open circuit to the fuse block module as required.
3. Turn the ignition switch to the Off position. Check for continuity between the ground circuit cavity of the rear wiper washer switch connector and a good ground. There should be continuity If OK, go to Step 4. If not OK, repair the open circuit to ground as required.
4. Check the continuity of the rear wiper/washer switch as described. If OK, go to Step 5. If not OK, replace the faulty switch.
5. Remove the rear wiper motor cover and unplug the rear wiper motor connector. 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 connector. If OK, go to
6. Turn the ignition switch to the Off position. Check for continuity between the ground circuit cavity of the rear wiper motor connector and a good ground. There should he continuity If OK, go to Step 7. If not OK, repair the open circuit to ground as required.
7. With the ignition switch still in the Off position and the rear wiper/washer switch still unplugged, check for continuity between the rear wiper motor control circuit cavity of the rear wiper motor 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 connector and the rear wiper/washer switch connector. There should be continuity If OK, replace the faulty rear wiper motor. If not OK, repair the open circuit as required.