GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Wiper/Washer Diagnostic System Check performed?

--

Go to Step 2

Go to Wiper/Washer System Check

2

  1. Turn the ignition switch to RUN.
  2. Move the wiper switch to all positions and then to OFF.
  3. Disconnect connector C202 from the wiper/washer switch connector.

Are the wipers still operating?

--

Go to Step 6

Go to Step 3

3

Check for a short circuit condition in the pigtail wires leading to the wiper/washer switch.

Was a short circuit condition found?

--

Go to Step 4

Go to Step 5

4

Repair the short circuit condition in the wiper/washer switch pigtail wires.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

5

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

Is the replacement complete?

--

Go to Wiper/Washer System Check

--

6

Turn the ignition OFF and then back to RUN.

Are the wipers still operating?

--

Go to Step 8

Go to Step 7

7

Replace the wiper motor cover. Refer to Wiper Motor Cover Replacement .

Is the replacement complete?

--

Go to Wiper/Washer System Check

--

8

Measure the voltage from connector 202 (vehicle side) terminal A5 to ground using a DMM.

Is the measured voltage greater than the specified value?

1.0 V

Go to Step 9

Go to Step 12

9

  1. Reconnect connector 202 to the wiper/washer switch connector.
  2. Disconnect the harness connector from the wiper motor assembly.
  3. Measure the voltage from the wiper motor connector (vehicle side) terminal G to ground using the DMM.

Is the measured voltage greater than the specified value?

1.0 V

Go to Step 11

Go to Step 10

10

Replace the wiper motor cover. Refer to Wiper Motor Cover Replacement .

Is the replacement complete?

--

Go to Wiper/Washer System Check

--

11

Repair the short to battery condition in CKT 478.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

12

Measure the voltage from the connector C202 (vehicle side) terminal D3 to ground using the DMM.

Is the measured voltage greater than the specified value?

1.0 V

Go to Step 16

Go to Step 13

13

  1. Reconnect connector C202 to the wiper/washer switch connector.
  2. Disconnect the harness connector from the wiper motor assembly.
  3. Measure the voltage from the wiper motor connector (harness side) terminal D using the DMM.

Is the voltage measured within the specified range?

10.5-15 V

Go to Step 14

Go to Step 15

14

Repair the short to battery condition in CKT 92.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

15

Replace the wiper motor cover. Refer to Wiper Motor Cover Replacement .

Is the replacement complete?

--

Go to Wiper/Washer System Check

--

16

  1. Reconnect wiper/washer switch connector C202.
  2. Disconnect the harness connector from the wiper motor assembly.
  3. Measure the voltage from the wiper motor connector terminal H to ground using the DMM.

Is the measured voltage greater than the specified value?

1.0 V

Go to Step 17

Go to Step 18

17

Repair the short to battery condition in CKT 477.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

18

Replace the wiper motor cover. Refer to Wiper Motor Cover Replacement .

Is the replacement complete?

--

Go to Wiper/Washer System Check

--