GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

  1. Turn the ignition switch to RUN.
  2. Press the washer switch to ON.

The wipers operate at low speed. The washer sprays the windshield as long as the washer switch is held ON. After releasing the switch, the washer stops and the wipers return to the park position after 2-4 sweeps.

    •  Washers Inoperative .

2

Turn the wiper switch to DELAY (pulse mode).

The wipers make one complete sweep, then pause for 1-22 seconds before making the next sweep. The pause time is adjusted by turning the wiper switch through the delay range.

3

  1. Turn the wiper switch to DELAY.
  2. Press the washer switch to ON.

The washer sprays the windshield as long as the washer switch is held ON. The wipers run at low speed while spraying and continue for 2-4 sweeps after the washer switch is released. The wipers then return to pulse operation.

    •  Washers Inoperative .

4

Turn the wiper switch to LO.

The wipers run continuously at low speed.

5

Turn the wiper switch to HI.

The wipers run continuously at high speed.

6

Turn the wiper switch to OFF.

The wipers return to the park position at low speed.

    •  Wipers Always On .

7

Turn the wiper switch to MIST, then release.

The wipers make one complete sweep at low speed, then return to the park position.

Wipers Mist, Delay, and Low Modes Inoperative .

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.