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

1

Did you perform the Wiper/Washers Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Wiper/Washer

2

  1. Turn ON the ignition ON, with the engine OFF.
  2. Operate the windshield wiper/washer switch through all the switch positions.

Does the windshield wiper/washer system operate normally?

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

Go to Step 3

3

  1. Turn OFF the ignition.
  2. Disconnect the harness connector of the windshield wiper motor.
  3. Turn the ignition ON, with the engine OFF.
  4. Connect a test lamp from the accessory voltage circuit of the windshield wiper motor to a good ground.

Does the test lamp illuminate?

Go to Step 4

Go to Step 12

4

Connect a test lamp from the accessory voltage circuit to the ground circuit of the windshield wiper motor.

Does the test lamp illuminate?

Go to Step 5

Go to Step 13

5

  1. Connect a test lamp from the signal 2 circuit of the windshield wiper switch to a good ground.
  2. Press the windshield washer switch.

Does the test lamp illuminate?

Go to Step 10

Go to Step 6

6

  1. Turn OFF the ignition.
  2. Disconnect the harness connector of the windshield wiper/washer switch.
  3. Turn ON the ignition, with the engine OFF.
  4. Connect a test lamp from the accessory voltage circuit of the windshield wiper/washer switch to a good ground.

Does the test lamp illuminate?

Go to Step 11

Go to Step 7

7

Test the accessory voltage circuit of the windshield wiper/washer switch for an open or short to ground. Refer to Circuit Testing or Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 17

Go to Step 8

8

Test the signal 1 circuit of the windshield wiper/washer switch for a short to ground. Refer to Circuit Testing or Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 17

Go to Step 9

9

Test the high speed circuit of the windshield wiper/washer switch for a short to ground. Refer to Circuit Testing or Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 17

Go to Step 14

10

Inspect for poor connections at the windshield wiper motor. 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 17

Go to Step 15

11

Inspect for poor connections at the windshield 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 17

Go to Step 16

12

Repair an open or a short to ground in the accessory voltage circuit of the windshield wiper motor. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 17

--

13

Repair an open or high resistance in the ground circuit of the windshield wiper motor. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 17

--

14

Repair a short to ground in the control circuit of the windshield washer pump. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 17

--

15

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

Did you complete the replacement?

Go to Step 17

--

16

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

Did you complete the replacement?

Go to Step 17

--

17

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3