GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

IMPORTANT: When performing the following checks, maintain some moisture on the front windshield so that the wiper motor does not overheat.

1

  1. Turn the ignition switch to the ON position.
  2. Leave the Wiper Switch in the OFF position.
  3. Depress the washer switch for 2 to 4 seconds and release.
    • Wipers operate at low speed.
    • Washer sprays windshield as long as washer switch is held in the ON position.
    • After releasing switch, washer stops and wipers return to park position after 2 to 4 sweeps.

Refer to Washers Inoperative .

2

  1. Move the wiper switch to the INT position.
  2. Rotate the INT ADJ switch from the high to low delay position.
    • Wipers make one complete sweep, then pause before making next sweep.
    • The pause time is adjusted by turning the INT ADJ switch through the delay range.

Refer to Wipers Delay Mode Inoperative .

3

  1. Leave the wiper switch in the INT position.
  2. Depress the washer switch for 2 to 4 seconds and release.
    • Washer sprays windshield as long as washer switch is held in the ON position.
    • Wipers run at low speed while spraying and continue for 2 to 4 sweeps after washer switch is released.
    • Wipers then return to pulse operation.
    • Refer to Washers Inoperative .
    • Refer to Wipers Delay Mode Inoperative .

4

Move the wiper switch to the LO position.

Wipers run continuously at low speed.

Refer to Wipers All Modes Inoperative

5

Move the wiper switch to the HI position.

Wipers run continuously at high speed.

    • Refer to Wipers All Modes Inoperative .

6

Move the wiper switch to the OFF position.

Wipers return to the park position at low speed.

Refer to Wipers Always On .

7

Move the wiper switch to the MIST position and then release.

Wipers make one complete sweep, then return to the park position.

    • Refer to Wipers Always On .
    • Refer to Wipers All Modes Inoperative

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