GM Service Manual Online
For 1990-2009 cars only

Step

Action

Values

Yes

No

1

Activate the windshield washer switch.

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, test the voltage at the windshield wiper switch connector terminal A4.

Is the voltage within the specified range?

11-14 V

Go to Step 8

Go to Step 3

3

Replace the wiper switch.

Did you complete the replacement?

--

System OK

--

4

Inspect the windshield washer fluid reservoir.

Is there washer fluid in the fluid reservoir?

--

Go to Step 6

Go to Step 5

5

Fill the windshield washer fluid reservoir.

Did you find and correct the condition?

--

System OK

--

6

Inspect the windshield washer hoses and the nozzles.

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

--

Go to Step 7

Go to Step 8

7

Repair the washer hoses and the nozzles.

Did you complete the repair?

--

System OK

--

8

  1. Turn the ignition ON.
  2. With the windshield washer activated, test the voltage at the windshield washer pump.

Is the voltage within the specified range?

11-14 V

Go to Step 10

Go to Step 9

9

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

Did you complete the repair?

--

System OK

--

10

Use an ohmmeter to measure the resistance between ground and the windshield washer pump connector terminal 1.

Is the resistance equal to the specified value?

0 ohms

Go to Step 12

Go to Step 11

11

Repair the windshield washer pump ground circuit.

Did you complete the repair?

--

System OK

--

12

Replace the windshield washer pump.

Did you complete the replacement?

--

System OK

--