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

  1. Turn ignition to the RUN position.
  2. Connect a test lamp between rear window wiper / washer switch connector cavity A and ground.

Does the test lamp light?

--

Go to Step 4

Go to Step 3

3

Repair open in CKT393(WHT) between rear window wiper/washer switch and the IP fuse block.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

4

  1. Connect a test lamp between rear window wiper / washer switch cavityB and ground.
  2. Depress the rear washer switch.

Does the test lamp light?

--

Go to Step 6

Go to Step 5

5

Replace the rear window wiper / washer switch.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

6

  1. Connect a test lamp between rear window washer pump motor connector cavityA and ground.
  2. Depress the rear window washer switch.

Does the test lamp light?

--

Go to Step 8

Go to Step 7

7

Repair open in CKT392(DK GRN) between rear window washer pump and rear window wiper / washer switch.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

8

Connect a DMM, set on Ohms, between rear window washer pump motor connector cavity B and ground.

Is continuity present?

--

Go to Step 9

Go to Step 10

9

Replace the rear window washer pump motor.

Is the repair complete?

--

Go to Wiper/Washer System Check

--

10

Repair open in CKT150(BLK) between rear window washer pump motor and G113.

Is the repair complete?

--

Go to Wiper/Washer System Check

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