GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Wiper/Washer Schematics

1

Did you review the Rear 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. Turn the rear wiper/washer switch to the OFF position.

Is the rear wiper always on?

Go to Step 3

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

3

  1. Disconnect the rear wiper motor connector.
  2. Turn the rear wiper/washer switch to the OFF position.
  3. Connect a test lamp from the rear wiper switch signal circuit terminal in the rear wiper motor harness connector to ground.
  4. Turn the ignition ON.

Does the test lamp illuminate?

Go to Step 5

Go to Step 4

4

  1. Connect a test lamp from the rear washer pump control circuit terminal in the rear wiper motor harness connector to ground.
  2. Turn the ignition ON.

Does the test lamp illuminate?

Go to Step 6

Go to Step 9

5

Test the rear wiper switch signal 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 11

Go to Step 7

6

Test the rear washer pump control 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 11

Go to Step 7

7

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

Did you find and correct the condition?

Go to Step 11

Go to Step 8

8

Replace the rear wiper/washer switch. Refer to Accessory Switch Replacement in Instrument Panel, Gages, and Console.

Is the repair complete?

Go to Step 11

--

9

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

Did you find and correct the condition?

Go to Step 11

Go to Step 10

10

Replace the rear wiper motor. Refer to Rear Window Wiper Motor 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