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. Hold the washer switch in the ON position.

The wipers operate at LO speed. The washer sprays the windshield as long as the washer switch is held in the ON position. 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.

Wipers Delay Mode Inoperative

3

  1. Turn the wiper switch to DELAY.
  2. Hold the wiper switch ON for 1-2 seconds.

The washer sprays as long as the washer switch is held ON. The wipers run at low speed during spray period 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.

Wipers Mist, Delay, and Low Modes Inoperative

5

Turn the wiper switch to HI.

The wipers run continuously at high speed.

Wipers High Mode Inoperative, Low Mode Operates

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, then return to the park position.

Wipers Mist, Delay, and Low Modes Inoperative