GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

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

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Go to Step 2

Go to Rear Wiper/Washer System Description and Operation

2

  1. Turn ON the ignition, with the engine OFF.
  2. Activate the rear window washer switch

Does the rear window washer operate properly?

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

Go to Step 3

3

  1. Disconnect the washer pump connector.
  2. Turn the ignition switch to ON.
  3. Connect a test lamp between terminals A and B of washer pump connector (harness side).
  4. Activate the washer switch while observing the test lamp.

Does the test lamp illuminate?

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Go to Step 5

Go to Step 4

4

  1. Connect the test lamp between the washer pump connector (harness side), terminal A, and ground.
  2. Activate the washer switch while observing the test lamp.

Does the test lamp illuminate?

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Go to Step 7

Go to Step 8

5

Inspect for a poor connection at the washer pump connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 10

Go to Step 6

6

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

Did you complete the replacement?

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Go to Step 10

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7

Repair the open in the ground circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 7

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8

Inspect for an open in the rear window washer pump control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 10

Go to Step 9

9

Replace the rear wiper/washer switch. Refer to Multifunction Switch Assembly Replacement - Instrument Panel in Lighting Systems.

Did you complete the replacement?

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Go to Step 10

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10

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 3