GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Wiper/Washer System Check?

 

Go to Step 2

Go to Wiper/Washer System Check or Wiper/Washer System Check

2

  1. Turn the ignition switch to RUN.
  2. Turn the wiper switch to OFF.
  3. Disconnect wiper motor connector C1.
  4. Connect a test light from connector C1 terminal C to ground.

Does the test lamp light?

--

Go to Step 3

Go to Step 4

3

  1. Disconnect wiper motor connector C2.
  2. Connect the test light from connector C2 terminal C to B+.

Does the test lamp light?

--

Go to Step 8

Go to Step 9

4

Test for an open in the wiper fuse or in CKT 143.

Does an open exist?

--

Go to Step 5

Go to Step 6

5

Repair the open in the wiper fuse or CKT 143.

Did you complete the repair?

--

Go to Wiper/Washer System Check or Wiper/Washer System Check

--

6

Test for an open in the power feed CKT 4.

Does an open exist?

--

Go to Step 7

Go to Step 3

7

Repair the open in the power feed CKT 4.

Did you complete the repair?

--

Go to Wiper/Washer System Check or Wiper/Washer System Check

--

8

  1. Turn the wiper switch to LOW.
  2. Connect a test lamp from connector C1, terminal B, to ground.

Does the test lamp light?

--

Go to Step 10

Go to Step 11

9

Repair the open in ground CKT 150.

Did you complete the repair?

--

Go to Wiper/Washer System Check or Wiper/Washer System Check

--

10

Test for continuity between the wiper motor connector C1, terminal A, and connector C2 , terminal B.

Is the continuity good?

--

Go to Step 14

Go to Step 17

11

Test for an open in CKT 91.

Does an open exist?

--

Go to Step 12

Go to Step 13

12

Repair the open in CKT 91.

Did you complete the repair?

--

Go to Wiper/Washer System Check or Wiper/Washer System Check

--

13

Replace the wiper/washer switch. Refer to Windshield Wiper and Washer Switch Replacement - On Vehicle .

Did you complete the repair?

--

Go to Wiper/Washer System Check or Wiper/Washer System Check

--

14

Test for a poor connection at the wiper motor connectors.

Does a poor connection exist?

--

Go to Step 15

Go to Step 16

15

Repair the poor connection at the wiper motor connectors.

Did you complete the repair?

--

Go to Wiper/Washer System Check or Wiper/Washer System Check

--

16

Replace the wiper motor. Refer to Windshield Wiper Motor Replacement .

Did you complete the repair?

--

Go to Wiper/Washer System Check or Wiper/Washer System Check

--

17

Repair the open in CKT 196.

Did you complete the repair?

--

Go to Wiper/Washer System Check or Wiper/Washer System Check

--