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 for less than 1 second.

The washer sprays the windshield and continues to spray for approximately 2-3 seconds after the washer switch is released. The wipers run at low speed and continue to run for approximately 6 seconds after the washer cycle is complete, then return to the park position.

    •  Washers Inoperative
    •  Washers Always On

2

  1. Turn the wiper switch to DELAY (pulse mode).
  2. Activate the delay time by turning the wiper switch through the delay range.

The wipers make one complete sweep, then pause for 0-25 seconds before making the next sweep.

Wipers Delay Mode Inoperative

3

  1. Turn the wiper switch to DELAY.
  2. Hold the washer 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 the spray period and continue for approximately 6 seconds after the spray cycle. The wipers then return to pulse operation.

    •  Washers Inoperative
    •  Washers Always On

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 and then return to the park position.

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