GM Service Manual Online
For 1990-2009 cars only

Washers Inoperative Washer Pump Inoperative

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 the ON position.
  2. Disconnect the WSW pump connector.
  3. Turn the WSWA switch to the MIST position.
  4. Use the DMM to measure the voltage between terminal 1 of the WSW pump connector and a known good ground.

Is the measured voltage within the specified value?

B+

Go to Step 4

Go to Step 3

3

  1. Locate an open or a high resistance in circuits FA3, FA4, and/or FA80.
  2. Repair the open or the high resistance in circuits FA3, FA4, and/or FA80.
  3. Replace the WSWA switch if these circuits are OK. Refer to Windshield Wiper and Washer Switch Replacement - On Vehicle in Steering Wheel and Column On Vehicle Service.

Is the repair or replacement complete?

--

Go to Step 7

--

4

  1. Turn the igniton to the OFF position.
  2. Disconnect the WSW pump connector.
  3. Use the DMM to measure the resistance between terminal 2 of the WSW pump connector and a known good ground.

Is the measured resistance within the specified value?

Less than 2 ohms

Go to Step 6

Go to Step 5

5

  1. Locate an open or a high resistance in circuit F30.
  2. Repair the open or the high resistance in circuit F30.

Is the repair complete?

--

Go to Step 7

--

6

Replace the WSW pump. Refer to Washer Pump Replacement in Wiper/Washer System.

Is the replacement complete?

--

Go to Step 7

--

7

  1. Connect all connectors and components that were disconnected.
  2. Verify that the WSW pump operates properly.

Does the WSW pump operate properly?

--

System OK

Go to Step 1

Washers Inoperative WSW Heated Nozzle Inoperative

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. Disconnect the affected windshield washer nozzle connector.
  2. Turn the ignition switch to the ON position.
  3. Use the DMM to measure the voltage between terminal A of the windshield washer nozzle connector and a known good ground.

Is the measured voltage within the specified value?

B+

Go to Step 4

Go to Step 3

3

  1. Locate an open or a high resistance in circuits X1, X2 and/or X600.
  2. Repair the open or the high resistance in circuits X1, X2 and/or X600

Is the repair complete?

--

Go to Step 7

--

4

  1. Turn the igniton to the OFF position.
  2. Use the DMM to measure the resistance between terminal B of the windshield washer nozzle connector and a known good ground.

Is the measured resistance within the specified value?

Less than 2 ohms

Go to Step 6

Go to Step 5

5

  1. Locate an open or a high resistance in circuits F1, F2 and/or F600.
  2. Repair the open or the high resistance in circuits F1, F2 and/or F600.

Is the repair complete?

--

Go to Step 7

--

6

Replace the affected windshield washer nozzle. Refer to Washer Nozzle Replacement in Wiper/Washer System.

Is the replacement complete?

--

Go to Step 7

--

7

  1. Connect all of the connectors and components that were disconnected.
  2. Verify that the windshield washer nozzles operate properly.

Do the windshield washer nozzles operate properly?

--

System OK

Go to Step 1