GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Wiper/Washer System Check Performed?

--

Go to Step 2

Go to Wiper/Washer System Check

2

  1. Turn the ignition switch to RUN.
  2. Backprobe with a test light from the wiper/washer switch connector terminal C to ground.

Is the test light on?

--

Go to Step 4

Go to Step 3

3

  1. Repair the open circuit condition, or the poor connection condition in CKT 143 to the wiper/washer switch.
  2. If the fuse is blown (open), check for a short circuit condition to ground in the related circuits (the related circuits will depend on whether the fuse blows before or after the system operation).

Is the repair complete?

--

Go to Wiper/Washer System Check

--

4

  1. Set the wiper switch to HI.
  2. Backprobe with a test light from the wiper/washer switch connector terminal A to ground.

Is the test light on?

--

Go to Step 8

Go to Step 5

5

Check for a poor connection condition at the wiper/washer switch terminals C and A.

Is a poor connection condition present?

--

Go to Step 6

Go to Step 7

6

Repair the poor connection condition at the wiper/washer switch terminals C and A.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

7

Replace the wiper/washer switch. Refer to Multifunction Turn Signal Lever Replacement in Steering.

Is the replacement complete?

--

Go to Wiper/Washer System Check

--

8

  1. Disconnect the wiper motor connector.
  2. Connect the test light from the wiper motor connector terminal C to ground.

Is the test light on?

--

Go to Step 10

Go to Step 9

9

Repair the open circuit condition in CKT 92 between the wiper/washer switch and the wiper motor.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

10

Connect a test light from wiper motor connector terminal C to terminal A.

Is the test light on?

--

Go to Step 12

Go to Step 11

11

Repair the open circuit condition or the poor connection condition to ground in CKT 150.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

12

Check for a poor connection condition to the wiper motor.

Is a poor connection condition present?

--

Go to Step 13

Go to Step 14

13

Repair the poor connection condition to the wiper motor.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

14

Replace the wiper motor. Refer to Windshield Wiper Motor Replacement

Is the replacement complete?

--

Go to Wiper/Washer System Check

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