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.

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