Wiper System

If the problem being diagnosed involves only the wipe-after-wash mode, see Washer System in the Diagnosis and Testing. For circuit descriptions and diagrams.

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, REFER TO AIRBAGS 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. Check the fuse in the junction block. If OK, go to Step 3. If not OK, repair the shorted circuit or component as required and replace the faulty fuse.
2. Turn the ignition switch to the On position. Check for battery voltage at the fuse in the junction block. If OK, go to Step 4. If not OK, repair the open circuit to the ignition switch as required.
3. Turn the ignition switch to the Off position. Check the resistance between the wiper motor ground terminal and a good ground. There should be no measurable resistance. If OK, go to Step 5. If not OK, repair the wiper motor ground as required.
4. Turn the ignition switch to the On position. Check for battery voltage at the fused ignition switch output (V6A) circuit cavity of the steering column wire harness connector. If OK, go to Step 6. If not OK, repair the open circuit to the fuse in the junction block as required.
5. If the problem being diagnosed involves only the intermittent wipe feature, see Intermittent Wipe Module (for vehicles without the optional Vehicle Theft Security System ) or Intermittent Wipe Relay (for vehicles with the optional VTSS) in the Diagnosis and Testing. If the problem being diagnosed involves only improper wiper blade parking, go to Step 11. If the problem involves inoperative low and/or high speed operation, go to Step 7.
6. With the ignition switch still in the On position, place the wiper switch in the Low speed position. Check for battery voltage at the low speed wiper switch output circuit cavity of the wiper motor wire harness connector. If OK, but the wiper motor does not run, replace the faulty wiper motor. If OK, and the wiper motor runs, go to Step 8. If not OK, go to Step 9.
7. With the ignition switch still in the On position, place the wiper switch in the High speed position. Check for battery voltage at the high speed wiper switch output circuit cavity of the wiper motor wire harness connector. If OK, but the wiper motor does not run, replace the faulty wiper motor. If not OK, go to Step 10.
8. With the ignition switch still in the On position, and the wiper switch still in the Low speed position, check for battery voltage at the low speed wiper switch output circuit cavity of the steering column wire harness connector. If OK, repair the open circuit to the wiper motor as required. If not OK, see Wiper Switch and Washer Switch in the Diagnosis and Testing.
9. With the ignition switch still in the On position, and the wiper switch still in the High speed position, check for battery voltage at the high speed wiper switch output circuit cavity of the steering column wire harness connector. If OK, repair the open circuit to the wiper motor as required. If not OK, see Wiper Switch and Washer Switch in the Diagnosis and Testing.
10. Turn the ignition switch to the On position. Check for battery voltage at the fused ignition switch output circuit cavity of the wiper motor wire harness connector. If OK, go to Step 12. If not OK, repair the open circuit to the fuse in the junction block as required.
11. With the ignition switch still in the On position, place the wiper switch in the Low speed position. With the wiper motor running, use a voltmeter to back probe the wiper park switch sense circuit cavity of the wiper motor wire harness connector. There should be a cycling voltage reading, battery voltage when the wiper blades are up, and zero volts when the wiper blades are down. If OK, see Intermittent Wipe Module (without VTSS) or Intermittent Wipe Relay (with VTSS) in the Diagnosis and Testing. If not OK, replace the faulty wiper motor.