GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Wiper/Washer Rear System Check performed?

--

Go to Step 2

Go to Wiper/Washer Rear System Check

2

Check for an open RR WPR fuse in the IP Fuse Block.

Was an open fuse found?

--

Go to Step 3

Go to Step 4

3

Replace the open fuse.

Is the replacement complete?

--

Go to Wiper/Washer Rear System Check

--

4

  1. Disconnect the rear washer pump connector.
  2. Turn the ignition switch to ON.
  3. Place the rear wiper/washer switch in the LO or HI position.
  4. Connect a test light between terminals A and B of the rear washer pump connector (harness side).
  5. Activate the rear washer switch while observing the test light.

Is the test light on?

--

Go to Step 5

Go to Step 8

5

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

Is a poor connection present?

--

Go to Step 6

Go to Step 7

6

Repair the poor connection.

Is the repair complete?

--

Go to Wiper/Washer Rear System Check

--

7

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

Is the replacement complete?

--

Go to Wiper/Washer Rear System Check

--

8

  1. Connect the test light between the rear washer pump connector (harness side) terminal B and ground.
  2. Place the rear wiper/washer switch in the LO or HI position.
  3. Activate the washer switch while observing the test light.

Is the test light on?

--

Go to Step 9

Go to Step 10

9

Repair the open in CKT 350.

Is the repair complete?

--

Go to Wiper/Washer Rear System Check

--

10

Check for a poor connection or an open in CKTs 43 and 392.

Is a poor connection or an open present?

--

Go to Step 11

Go to Step 12

11

Repair poor connection or the open in CKT 43 or 392.

Is the repair complete?

--

Go to Wiper/Washer Rear System Check

--

12

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

Is the replacement complete?

--

Go to Wiper/Washer Rear System Check

--