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 windshield washer pump is always ON.

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

  1. Turn the windshield wiper/washer switch to the OFF position.
  2. Turn ON the ignition.

Is the windshield washer pump always ON?

Go to Step 3

Go to Testing for Intermittent Conditions and Poor Connections

3

Are the windshield washer wipers always ON?

Go to Step 4

Go to Step 6

4

  1. Disconnect the windshield wiper motor connector.
  2. Connect a test lamp from the windshield wiper switch signal 1 circuit terminal to ground.
  3. Turn ON the ignition.

Does the test lamp illuminate?

Go to Step 5

Go to Step 11

5

Test the windshield wiper switch signal 1 circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 13

Go to Step 10

6

Disconnect the windshield washer relay.

Is the windshield washer pump ON?

Go to Step 8

Go to Step 7

7

Connect a test lamp from battery positive voltage to the windshield washer relay control circuit terminal in the underhood fuse block.

Does the test lamp illuminate?

Go to Step 9

Go to Step 12

8

Repair the windshield washer pump control circuit for a short to voltage. Refer to Wiring Repairs .

Is the repair complete?

Go to Step 13

--

9

Test the windshield washer relay control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 13

Go to Step 11

10

Replace the windshield wiper/washer switch. Refer to Turn Signal Multifunction Switch Replacement .

Is the repair complete?

Go to Step 13

--

11

Replace the windshield wiper motor cover. Refer to Windshield Wiper Motor Cover Replacement .

Is the repair complete?

Go to Step 13

--

12

Replace the windshield washer relay.

Is the repair complete?

Go to Step 13

--

13

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3