GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Disconnect the connector at the windshield washer pump motor.
  2. Connect a test lamp from the windshield washer pump motor connector terminal B to ground.

Did the test lamp light?

--

Go to Step 3

Go to Step 2

2

Repair the open in CKT 6 (BLU/RED) between S234 and the windshield washer pump motor connector.

Refer to Wiring Repairs .

Is the repair complete?

--

System OK

--

3

  1. Connect a DMM from the windshield washer pump motor connector terminal A to ground.
  2. Press and hold the WASH switch.

Is there continuity?

--

Go to Step 4

Go to Step 5

4

Replace the windshield washer pump motor.

Refer to Washer Pump/Reservoir Replacement .

Is the repair complete?

--

System OK

--

5

  1. Backprobe the multifunction switch connector with a DMM from terminal 12 to chassis ground.
  2. Press and hold the WASH switch.

Is there continuity?

--

Go to Step 6

Go to Step 7

6

Repair the open in CKT 453 (BLU/ORN) between the multifunction switch and the windshield washer pump motor connector.

Refer to Wiring Repairs .

Is the repair complete?

--

System OK

--

7

Replace the multifunction switch.

Refer to Windshield Wiper and Washer Switch Replacement

Is the repair complete?

--

System OK

--