GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

  1. Put the ignition switch in the RUN position.
  2. Put the rear window wiper switch into the HI position.
  3. Push the rear window wiper switch into the WASH position.

Washer fluid sprays the rear window until you release the switch. The wiper continues to operate.

2

Put the rear window wiper switch into the LO position.

The wiper operates with approximately a 5 second delay.

Rear Washer Inoperative

3

Put the rear window wiper switch into the HI position.

The wiper operates at a constant, faster speed.

Rear Washer Inoperative

4

  1. Put the rear window wiper switch into the LO position.
  2. Push the rear window wiper switch into the WASH position.

Washer fluid sprays the rear window until you release the switch. The wiper operates continuously for approximately 3 cycles, then reverts to delay operation.

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