GM Service Manual Online
For 1990-2009 cars only

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Action

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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 switch ON.
  2. Turn 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. Disconnect the inline harness connector C112.
  2. Connect a test lamp from the accessory voltage supply circuit terminal in the body harness connector half to a good ground.
  3. Turn the ignition ON.

Does the test lamp illuminate?

Go to Step 4

Go to Step 7

4

  1. Connect a test lamp from the accessory voltage supply circuit terminal to the ground circuit terminal in the C112 body harness connector half.
  2. Turn the ignition ON.

Does the test lamp illuminate?

Go to Step 5

Go to Step 8

5

  1. Connect the test lamp from the windshield wiper switch signal 2 circuit terminal in the C112 body harness connector half to ground.
  2. Turn the ignition ON.
  3. Press the windshield washer switch.

Does the test lamp illuminate?

Go to Step 10

Go to Step 6

6

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

Does the test lamp illuminate?

Go to Step 13

Go to Step 9

7

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

Is the repair complete?

Go to Step 15

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8

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

Is the repair complete?

Go to Step 15

--

9

Repair the windshield wiper/washer switch accessory voltage supply circuit for an open or short to ground. Refer to Wiring Repairs or to Connector Repairs in Wiring Systems.

Is the repair complete?

Go to Step 15

--

10

  1. Disconnect the windshield wiper motor connector.
  2. Test the windshield wiper motor voltage supply and ground circuits in the wiper motor harness for an open or high resistance. Refer to Wiring Repairs and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 11

11

Inspect for poor connections at the windshield 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 15

Go to Step 12

12

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

Is the repair complete?

Go to Step 15

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13

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 15

Go to Step 14

14

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

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