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 Wiper/Washer System Check

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 Wiper/Washer System Check

--

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 Wiper/Washer System Check

--

6

Check for clogged windshield washer nozzles.

Are the nozzles clogged?

--

Go to Step 7

Go to Step 8

7

Replace the clogged nozzles.

Are the nozzles replaced?

--

Go to Wiper/Washer System Check

--

8

Check wiper fuse 2 (ACC) in the Underhood Junction Block to determine if it is open (blown).

Is the fuse open (blown)?

--

Go to Step 9

Go to Step 10

9

Replace the blown fuse.

Is the replacement complete?

--

Go to Wiper/Washer System Check

--

10

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

Is the test light on?

--

Go to Step 11

Go to Step 14

11

Check for a poor connection condition at the washer pump connector.

Is a poor connection condition present?

--

Go to Step 12

Go to Step 13

12

Repair the poor connection condition.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

13

Replace the washer pump. Refer to Washer Pump/Reservoir Replacement

Is the replacement complete?

--

Go to Wiper/Washer System Check

--

14

  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 15

Go to Step 16

15

Repair the poor connection condition or open circuit condition in CKT 1250.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

16

  1. Backprobe the wiper motor connector, terminal A to ground using a test light.
  2. Activate the washer switch.

Is the test light on?

--

Go to Step 17

Go to Step 18

17

Repair the poor connection condition or open circuit condition in CKT 228.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

18

  1. Backprobe wiper motor connector terminal G to ground using a test light.
  2. Activate the washer switch.

Is the test light on?

--

Go to Step 21

Go to Step 19

19

Check for an open circuit condition in CKT 478.

Is an open circuit condition present?

--

Go to Step 20

Go to Step 22

20

Repair the open circuit condition in CKT 478.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

21

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

Is the replacement complete?

--

Go to Wiper/Washer System Check

--

22

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

Is the replacement complete?

--

Go to Wiper/Washer System Check

--