GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Wiper/Washer Diagnostic System Check performed?

--

Go to Step 2

Go to Diagnostic System Check - Wiper/Washer

2

Check the washer solvent container fluid level.

Is the washer solvent container filled?

--

Go to Step 4

Go to Step 3

3

Fill the washer solvent container.

Is the washer solvent container filled?

--

Go to Diagnostic System Check - Wiper/Washer

--

4

Check the hoses to ensure that they are correctly attached and that they are not pinched or kinked.

Are the hoses OK?

--

Go to Step 6

Go to Step 5

5

Repair the hoses.

Are the hoses repaired?

--

Go to Diagnostic System Check - Wiper/Washer

--

6

Check for clogged windshield washer nozzles.

Are the nozzles clogged?

--

Go to Step 7

Go to Step 8

7

  1. Clear the clogged nozzles by applying air pressure.
  2. Replace the nozzles if they remain clogged.

Are the nozzles cleared or replaced?

--

Go to Diagnostic System Check - Wiper/Washer

--

8

  1. Disconnect the washer pump connector.
  2. Turn the ignition switch to ON.
  3. Connect a test light between terminals A and B of the washer pump connector (harness side).
  4. Activate the washer switch while observing the test light.

Is the test light on?

--

Go to Step 9

Go to Step 12

9

Check for a poor connection at the washer pump connector.

Is a poor connection present?

--

Go to Step 10

Go to Step 11

10

Repair the poor connection.

Is the repair complete?

--

Go to Diagnostic System Check - Wiper/Washer

--

11

Replace the washer pump. Refer to Windshield Washer Solvent Container Replacement .

Is the replacement complete?

--

Go to Diagnostic System Check - Wiper/Washer

--

12

  1. Connect the test light between the washer pump connector (harness side) terminal A and ground.
  2. Activate the washer switch while observing test light.

Is the test light on?

--

Go to Step 13

Go to Step 16

13

Check for a poor connection or an open in CKT 227.

Is the repair complete?

--

Go to Step 15

Go to Step 14

14

Replace the wiper motor (the internal ground circuit is open).

Is the replacement complete?

--

Go to Diagnostic System Check - Wiper/Washer

--

15

Repair the poor connection or open in CKT 227.

Is the repair complete?

--

Go to Diagnostic System Check - Wiper/Washer

--

16

  1. Connect the test light from the wiper motor connector C1, terminal D to ground.
  2. Activate the washer switch.

Is the test light on?

--

Go to Step 17

Go to Step 18

17

Repair the poor connection or open in CKT 228.

Is the repair complete?

--

Go to Diagnostic System Check - Wiper/Washer

--

18

  1. Backprobe wiper/washer connector C202, terminal E9 to ground using a DMM.
  2. Activate the washer switch while observing the DMM.

Is battery voltage present?

10.5-15 V

Go to Step 19

Go to Step 22

19

Check for a poor connection or an open in CKT 94.

Is a poor connection or open circuit present?

--

Go to Step 20

Go to Step 21

20

Repair the poor connection or open in CKT 94.

Is the repair complete?

--

Go to Diagnostic System Check - Wiper/Washer

--

21

Replace the wiper motor cover. Refer to Wiper Motor Cover Replacement .

Is the replacement complete?

--

Go to Diagnostic System Check - Wiper/Washer

--

22

Replace the wiper/washer switch. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle .

Is the replacement complete?

--

Go to Diagnostic System Check - Wiper/Washer

--