GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Wiper/Washer Schematics

Connector End View Reference: Master Electrical Component List

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

  1. Turn the ignition to the ON position.
  2. Press the windshield washer switch.

Does the windshield washer pump operate?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

  1. Disconnect the body control module (BCM) connector C1.
  2. Install a fused jumper between battery positive voltage and the windshield washer pump control circuit.

Does the windshield washer fluid pump operate?

Go to Step 6

Go to Step 4

4

  1. Disconnect the windshield washer pump.
  2. Connect the BCM connector C1.
  3. Using a test lamp probe between windshield washer pump control circuit and ground.
  4. Turn the ignition to the ON position.
  5. Press the washer switch.

Does the test lamp illuminate?

Go to Step 5

Go to Step 8

5

Test for a poor connection or an open in the ground circuit of the windshield washer fluid pump. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 12

Go to Step 9

6

  1. Disconnect the windshield wiper/washer switch.
  2. Install a jumper between windshield washer switch signal circuit and ground.
  3. Turn the ignition to the ON position.

Does the windshield washer fluid pump operate?

Go to Step 10

Go to Step 7

7

Test for a poor connection, an open, or a short to battery positive voltage in the windshield washer switch signal circuit. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 12

Go to Step 11

8

Repair a poor connection, or an open in the windshield washer pump control circuit. Refer to Circuit Testing and Wiring Repairs .

Did you complete the repair?

Go to Step 12

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9

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

Did you complete the replacement?

Go to Step 12

--

10

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

Did you complete the replacement?

Go to Step 12

--

11

Replace the BCM. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 12

--

12

Operate the system to verify the repair.

Did you correct the condition?

System OK

Go to Step 3