GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Wiper/Washer Schematics

1

Did you perform the Wiper/Washer System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Wiper/Washer

2

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

Are the windshield wipers always on?

Go to Step 3

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

3

  1. Disconnect the steering column harness connector.
  2. Remove the connector terminal row E from the steering column connector half.
  3. Connect the steering column harness connector.
  4. Turn the ignition ON.

Are the windshield wipers always on?

Go to Step 4

Go to Step 6

4

Test the windshield wiper switch high signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 5

5

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

Did you find and correct the condition?

Go to Step 12

Go to Step 9

6

Test the windshield wiper switch high signal circuit in the steering column harness for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 7

7

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

Did you find and correct the condition?

Go to Step 12

Go to Step 8

8

Inspect for poor connections at the windshield wiper/washer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 10

9

Inspect for poor connections at the windshield wiper motor cover. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 11

10

Replace the windshield wiper/washer switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement in Steering Wheel and Column.

Did you complete the replacement?

Go to Step 12

--

11

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

Did you complete the replacement?

Go to Step 12

--

12

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3