GM Service Manual Online
For 1990-2009 cars only

Low or Mist Modes Inoperative

Step

Action

Value(s)

Yes

No

1

Did you review the Wiper Washer System Circuit Description and perform the necessary inspections?

--

Go to Step 2

Go to Symptoms

2

  1. Disconnect the windshield wiper/washer switch pigtail connector C219.
  2. Set the windshield wiper/washer switch to the LO position.
  3. Measure the resistance through the windshield wiper/washer switch from the connector terminals C to A.

Is the resistance within the specified values?

0-2 ohms

Go to Step 3

Go to Step 4

3

  1. With the windshield wiper/washer switch set to the LO position.
  2. Measure the resistance through the windshield wiper/washer switch from the connector terminals C to B.

Is the resistance within the specified values?

23-25K ohms

Go to Step 5

Go to Step 4

4

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

Did you complete the repair?

--

Go to Step 7

--

5

Test and repair the following circuits for an open or high resistance between the windshield wiper/washer switch connector C219 and the windshield wiper motor connector:

    • circuit 91
    • circuit 95

Did you find and correct the condition?

--

Go to Step 7

Go to Step 6

6

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

Is the repair complete?

--

Go to Step 7

--

7

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Symptoms