GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Wiper/Washer Schematics

Connector End View Reference: Wiper/Washer Connector End Views

DEFINITION: The rear window washer is inoperative and the rear window wiper operates normally.

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

  1. Turn ON the ignition.
  2. Press the rear window washer switch.

Does the rear window washer operate normally?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

  1. Disconnect the rear washer pump connector.
  2. Connect a test lamp across the rear washer pump harness connector terminals.
  3. Turn ON the ignition.
  4. Press the rear window washer switch.

Does the test lamp illuminate?

Go to Step 6

Go to Step 4

4

Test the rear washer pump control circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 9

Go to Step 5

5

Test the rear washer pump ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 9

Go to Step 8

6

Inspect for poor connections at the rear washer pump. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 9

Go to Step 7

7

Replace the rear washer pump. Refer to Rear Window Washer Pump Replacement .

Did you complete the replacement?

Go to Step 9

--

8

Replace the rear washer relay.

Did you complete the replacement?

Go to Step 9

--

9

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3