GM Service Manual Online
For 1990-2009 cars only

Step

Action

Values

Yes

No

1

  1. Turn the ignition ON.
  2. Turn the wiper switch to HI.
  3. Measure the voltage at the wiper motor connector terminal 5.

Is the voltage within the specified range?

11-14 V

Go to Step 2

Go to Step 3

2

Replace the wiper motor.

Did you complete the replacement?

--

System OK

--

3

  1. Disconnect the wiper switch.
  2. Turn the wiper switch to HI.
  3. Use an ohmmeter to verify for continuity between the wiper switch connector terminal A8 and A9.

Does the ohmmeter indicate the specified value?

0 ohms

Go to Step 5

Go to Step 4

4

Replace the wiper switch.

Did you complete the replacement?

--

System OK

--

5

Repair the open circuit between the wiper switch connector terminal A9 and the wiper motor connector terminal 6.

Did you complete the repair?

--

System OK

--