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 Diagnostic System Check - Wiper/Washer

2

Check the wiper/washer fuse 8E for an open.

Is the fuse open?

--

Go to Step 3

Go to Step 4

3

Replace the wiper/washer fuse.

Is the replacement complete?

--

Go to Diagnostic System Check - Wiper/Washer

--

4

  1. Disconnect the wiper/washer switch connector C202.
  2. Set ignition switch to RUN.
  3. Connect a test light from connector C202, terminal E5 to ground.

Is the test light on?

--

Go to Step 6

Go to Step 5

5

Repair the open or poor connection in CKT 143.

Is the repair complete?

--

Go to Diagnostic System Check - Wiper/Washer

--

6

  1. Disconnect the wiper motor connector C2.
  2. Connect the test light from connector C2, terminal C to battery voltage.

Is the test light on?

--

Go to Step 8

Go to Step 7

7

Repair the open in CKT 1150.

Is the repair complete?

--

Go to Diagnostic System Check - Wiper/Washer

--

8

  1. Reconnect the wiper/washer switch connector C202.
  2. Disconnect the wiper motor connector C1.
  3. Connect the test light from wiper motor connector C1, terminal C to ground.

Is the test light on?

--

Go to Step 12

Go to Step 9

9

Check for an open in CKT 95.

Is an open circuit present?

--

Go to Step 10

Go to Step 11

10

Repair the open in CKT 95.

Is the repair complete?

--

Go to Diagnostic System Check - Wiper/Washer

--

11

Replace the wiper/washer switch. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle .

Is the replacement complete?

--

Go to Diagnostic System Check - Wiper/Washer

--

12

  1. Set the wiper switch to LO.
  2. Connect the test light from the wiper motor connector terminal B to ground.

Is the test light on?

--

Go to Step 15

Go to Step 13

13

Check for an open in CKT 91.

Is an open circuit present?

--

Go to Step 14

Go to Step 11

14

Repair the open in CKT 91.

Is the repair complete?

--

Go to Diagnostic System Check - Wiper/Washer

--

15

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

Is continuity present?

--

Go to Step 16

Go to Step 19

16

Check for a poor connection at wiper motor connector C2, terminal A.

Is a poor connection present?

--

Go to Step 18

Go to Step 17

17

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

Is the replacement complete?

--

Go to Diagnostic System Check - Wiper/Washer

--

18

Correct the poor connection.

Is the poor connection corrected?

--

Go to Diagnostic System Check - Wiper/Washer

--

19

Check for an open in CKT 92.

Is an open circuit present?

--

Go to Step 20

Go to Step 11

20

Repair the open in CKT 92.

Is the repair complete?

--

Go to Diagnostic System Check - Wiper/Washer

--