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/Washer Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Wiper/Washer

2

  1. Turn the ignition switch ON.
  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 low speed circuit to the ground circuit of the windshield wiper motor.
  5. Press the windshield washer switch.

Does the test lamp illuminate?

Go to Step 9

Go to Step 4

4

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

Does the test lamp illuminate?

Go to Step 12

Go to Step 5

5

  1. Turn OFF the ignition.
  2. Disconnect the harness connector of the windshield wiper/washer switch.
  3. Turn the ignition ON, 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 10

Go to Step 6

6

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

Did you find and correct the condition?

Go to Step 16

Go to Step 7

7

Test supply voltage circuit of the Wiper 2 relay coil 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 16

Go to Step 8

8

Test the control circuit of the windshield washer pump 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 16

Go to Step 11

9

Inspect for poor connections at the harness connector of 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 16

Go to Step 13

10

Inspect for poor connections at the harness connector of 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 16

Go to Step 14

11

Inspect for poor connections at the harness connector of the windshield washer pump. 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 16

Go to Step 15

12

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 16

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13

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

Did you complete the replacement?

Go to Step 16

--

14

Replace the windshield wiper/washer switch. Refer to Windshield Wiper and Washer Switch Replacement .

Did you complete the replacement?

Go to Step 16

--

15

Replace the windshield washer pump. Refer to Washer Pump Replacement .

Did you complete the replacement?

Go to Step 16

--

16

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3