GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Wiper/Washer Schematics

1

Did you review the Wiper/Washer System Description and Operation and perform the necessary inspections?

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Step 2

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Symptoms - Wiper/Washer Systems

2

  1. Turn the ignition on.
  2. Pull and release the windshield wiper/washer switch lever.

Do the windshield washers operate normal?

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Testing for Intermittent Conditions and Poor Connections In Wiring Systems

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Step 3

3

Do the windshield wipers operate normal during wash mode?

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Step 8

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Step 4

4

  1. Disconnect the windshield wiper motor relay K8.
  2. Connect a test lamp from the washer switch signal circuit terminal in the wiper motor relay connector to ground.
  3. Turn the ignition on.
  4. Pull the windshield washer lever to the wash position.

Does the test lamp illuminate?

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Step 7

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Step 5

5

  1. Disconnect the windshield wiper/washer switch connector.
  2. Test and repair the washer switch signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs or Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to

Step 12

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Step 6

6

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

Is the repair complete?

Go to

Step 12

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7

Replace the windshield wiper motor relay K8.

Is the repair complete?

Go to

Step 12

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8

  1. Disconnect the windshield washer pump connector.
  2. Connect a test lamp from the washer switch signal circuit terminal in the washer pump connector to ground.
  3. Turn the ignition on.
  4. Pull the windshield wiper washer switch to the wash position.

Does the test lamp illuminate?

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Step 10

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Step 9

9

Repair the windshield washer switch signal circuit for an open or high resistance. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Is the repair complete?

Go to

Step 12

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10

Test and repair the windshield washer pump ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs or Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to

Step 12

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Step 11

11

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

Is the repair complete?

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Step 12

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12

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

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Step 3