GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

  1. Turn the ignition switch to ACCY or 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 2½ seconds after the 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 .

2

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

The wipers make one complete sweep, then pause for 0-25 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 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 .

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 park.

Wipers Low Mode Inoperative, High Mode Operates .

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