GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

DEFINITION: This diagnostic should only be used when the rear wiper motor runs continuously with the ignition switch is in ACC or RUN and the switch is in the OFF position.

1

Did you perform the Rear Wiper/Washer System Check?

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Go to Step 2

Go to Wiper/Washer System Check

2

Disconnect the rear window wiper/washer switch connector.

Did the rear wiper turn OFF?

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Go to Step 3

Go to Step 4

3

Replace the rear window wiper/washer switch.

Is the repair complete?

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Go to Wiper/Washer System Check

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4

  1. Repair short to power in CKT391 (GRY between the rear window wiper/washer switch and the rear window wiper/washer module. Refer to Wiring Repairs in Wiring Systems.
  2. If no short was found, replace the rear window wiper/washer module. Refer to Rear Window Wiper Motor Replacement .

Is the repair complete?

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Go to Wiper/Washer System Check

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