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. Set the wiper switch to LO.
  3. Backprobe from the wiper/washer switch connector C201, terminal E2, to ground with a DMM.

Is the measurement greater than the specified value?

1.0 V

Go to Step 6

Go to Step 3

3

Check for a poor connection at connector C201, or for an open in the pigtail to the wiper/washer switch.

Is a poor connection or an open present?

--

Go to Step 5

Go to Step 4

4

Replace the wiper/washer switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle .

Is the replacement complete?

--

Go to Wiper/Washer System Check

--

5

Repair the poor connection or the open in the pigtail wires to the wiper/washer switch.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

6

Backprobe from the wiper/washer switch connector C201, terminal E3, to ground with a DMM.

Is the measurement greater than the specified voltage?

1.0 V

Go to Step 10

Go to Step 7

7

Check for a poor connection at connector C201, or for an open in the pigtail to the wiper/washer switch.

Is a poor connection or an open present?

--

Go to Step 9

Go to Step 8

8

Replace the wiper/washer switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle .

Is the replacement complete?

--

Go to Wiper/Washer System Check

--

9

Repair the poor connection or the open in the pigtail wires to the wiper/washer switch.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

10

  1. Disconnect the wiper motor connector.
  2. Measure the voltage from the wiper motor connector, terminal D, to ground with a DMM.

Is the measurement greater than the specified value?

1.0 V

Go to Step 12

Go to Step 11

11

Repair the open in CKT 113.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

12

Measure the voltage from the wiper motor connector, terminal E, to ground with a DMM.

Is the measurement greater than the specified value?

1.0 V

Go to Step 14

Go to Step 13

13

Repair the open in CKT 112.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

14

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

Is the replacement complete?

--

Go to Wiper/Washer System Check

--