GM Service Manual Online
For 1990-2009 cars only

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

Do the wipers operate properly?

--

Go to Step 3

Diagnose and repair the wiper system. Go to Wiper/Washer System Check .

3

Remove and inspect the W/W PMP fuse.

Is the fuse open?

--

Go to Step 4

Go to Step 7

4

Check for a short to ground in CKT 228 and the underhood bussed electrical center (UBEC).

Is a short to ground present?

--

Go to Step 5

Go to Step 6

5

Repair the short to ground in CKT 228 and the UBEC.

Is the repair complete?

--

Go to Step 6

--

6

Replace the W/W PMP fuse.

Is the replacement complete?

--

Go to Wiper/Washer System Check

--

7

  1. Turn the ignition to the ON position.
  2. Connect a test light (backprobe) from terminal E9 at the wiper/washer switch connector C201C to ground.
  3. Turn the washer switch ON while backprobing.

Is the test light on?

--

Go to Step 9

Go to Step 8

8

Replace the wiper/washer switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle .

Is the replacement complete?

--

Go to Wiper/Washer System Check

--

9

  1. Connect a test light from terminal A of the W/W PMP fuse to ground using the J 35616A connector test adapter kit.
  2. Turn the washer switch ON.

Is the test light ON?

--

Go to Step 11

Go to Step 10

10

Repair the open in CKT 94 between the switch and the UBEC.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

11

  1. Reinstall the fuse.
  2. Disconnect the windshield washer pump connector.
  3. Connect a test light from the washer pump connector (harness side), terminal A to ground.
  4. Move the washer switch to ON.

Is the test light on?

--

Go to Step 13

Go to Step 12

12

Repair the open in CKT 228 between the UBEC and the pump.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

13

Connect a test light from the washer pump connector (harness side), terminal A to terminal B.

Is the test light on?

--

Go to Step 14

Go to Step 15

14

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

Is the replacement complete?

--

Go to Wiper/Washer System Check

--

15

Repair the open in CKT 150.

Is the repair complete?

--

Go to Wiper/Washer System Check

--