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: Windshield wipers are inoperative in all modes.

1

Did you perform 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. Attempt to operate the windshield wipers in all modes.

Are the windshield wipers inoperative in all modes?

Go to Step 3

Go to Testing for Intermittent Conditions and Poor Connections

3

  1. Disconnect the turn signal/ multifunction switch connectors.
  2. Connect a fused jumper wire from the windshield wiper switch high signal circuit terminal to ground.
  3. Turn the ignition ON.

Do the windshield wipers operate at high speed?

Go to Step 9

Go to Step 4

4

  1. Disconnect the windshield wiper motor module connector.
  2. Connect a test lamp from the accessory voltage supply circuit terminal in the windshield wiper motor harness connector to a good ground.
  3. Turn the ignition ON.

Does the test lamp illuminate?

Go to Step 5

Go to Step 7

5

Connect a test lamp from battery positive voltage to the windshield wiper motor ground circuit terminal in the windshield wiper motor module harness connector.

Does the test lamp illuminate?

Go to Step 6

Go to Step 8

6

  1. Connect the wiper motor module connector.
  2. Disconnect the wiper motor to module connector.
  3. Connect a test lamp across the low speed motor control and ground circuit terminals in the module.
  4. Turn the windshield wiper switch to the low position.

Does the test lamp illuminate for several seconds?

Go to Step 12

Go to Step 11

7

Repair the accessory voltage supply circuit to the windshield wiper motor and module for an open or short to ground. Refer to Circuit Testing and Wiring Repairs .

Is the repair complete?

Go to Step 15

--

8

Repair the windshield wiper motor and module ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .

Is the repair complete?

Go to Step 15

--

9

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

Did you find and correct the condition?

Go to Step 15

Go to Step 10

10

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

Is the repair complete?

Go to Step 15

--

11

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

Did you find and correct the condition?

Go to Step 15

Go to Step 13

12

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

Did you find and correct the condition?

Go to Step 15

Go to Step 14

13

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

Is the repair complete?

Go to Step 15

--

14

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

Is the repair complete?

Go to Step 15

--

15

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3