GM Service Manual Online
For 1990-2009 cars only

Test Description

The number below refers to the step number on the diagnostic table.

  1. Tests for an internal fault in the windshield wiper/washer switch.

Step

Action

Yes

No

Schematic Reference: Wiper/Washer Schematics

Connector End View Reference: Wiper/Washer Connector End Views

1

Did you review the Wiper/Washer System Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Wiper/Washer Systems

2

  1. Turn the ignition ON.
  2. Operate the windshield wiper/washer switch in all of the switch positions.
  3. Turn the windshield wiper/washer switch OFF.

Are the windshield wipers always on?

Go to Step 3

Go to Testing for Intermittent Conditions and Poor Connections

3

Disconnect the windshield wiper/washer switch connector at the multifunction switch assembly.

Are the windshield wipers always on?

Go to Step 4

Go to Step 7

4

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

Did you find and correct the condition?

Go to Step 11

Go to Step 5

5

Test the windshield wiper switch signal 2 circuit for a short to voltage. Refer to Circuit Testing and to Wiring Repairs .

Did you find and correct the condition?

Go to Step 11

Go to Step 6

6

Test the windshield wiper motor high speed circuit for a short to voltage. Refer to Circuit Testing and to Wiring Repairs .

Did you find and correct the condition?

Go to Step 11

Go to Step 9

7

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

Did you find and correct the condition?

Go to Step 11

Go to Step 8

8

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

Is the repair complete?

Go to Step 11

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9

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

Did you find and correct the condition?

Go to Step 11

Go to Step 10

10

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

Is the repair complete?

Go to Step 11

--

11

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3