GM Service Manual Online
For 1990-2009 cars only

Step

Action

Values

Yes

No

1

Do the windshield wipers operate when the washer switch is activated?

--

Go to Step 4

Go to Step 2

2

  1. Turn the ignition ON.
  2. While activating the washer switch, use a voltmeter to test for battery voltage at the windshield wiper switch.

Is battery voltage available at the windshield wiper switch connector terminal 4?

11-14 V

Go to Step 8

Go to Step 3

3

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

Is the repair complete?

--

System OK

--

4

Is there washer fluid in the windshield washer fluid reservoir?

--

Go to Step 6

Go to Step 5

5

Fill the windshield washer fluid reservoir.

Is the repair complete?

--

System OK

--

6

Are the windshield washer hoses or the nozzles clogged or damaged?

--

Go to Step 7

Go to Step 8

7

Repair the washer hoses and the nozzles.

Is the repair complete?

 

System OK

 

8

  1. Turn the ignition ON.
  2. With the windshield washer activated, use a voltmeter to test for battery voltage at the windshield washer pump.

Is battery voltage available at the windshield washer pump?

11-14 V

Go to Step 10

Go to Step 9

9

Repair the open circuit between the windshield washer pump and the windshield wiper switch.

Is the repair complete?

--

System OK

--

10

Use an ohmmeter to check the ground circuit at the windshield washer pump.

Is the ground circuit OK?

0 ohms

Go to Step 12

Go to Step 11

11

Repair the windshield washer pump ground circuit.

Is the repair complete?

--

System OK

--

12

Replace the windshield washer pump. Refer to Washer Pump Replacement .

Is the repair complete?

--

System OK

--