GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Wiper/Washer Rear System Check?

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Go to Step 2

Go to Wiper/Washer Rear System Check

2

  1. Set the ignition switch to RUN.
  2. Backprobe from the rear wiper/washer switch connector, terminal 5, to ground with a test lamp.

Does the test lamp illuminate?

--

Go to Step 5

Go to Step 3

3

Inspect for an open RR WPR/WSHR fuse.

Did you find and correct the condition?

--

Go to Step 16

Go to Step 4

4

Repair the open in CKT 393. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 16

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5

    • Set the rear wiper/washer switch to DELAY.
    • Backprobe from the rear wiper/washer switch connector, terminal 6, to ground with a test lamp.

Does the test lamp illuminate?

--

Go to Step 8

Go to Step 6

6

Inspect for a poor connection at the rear wiper/washer switch connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 16

Go to Step 7

7

Replace the rear wiper/washer switch. Refer to Multifunction Switch Assembly Replacement - Instrument Panel in Lighting Systems.

Did you complete the repair?

--

Go to Step 16

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8

Backprobe from the rear wiper motor connector, terminal D, to ground with a test lamp.

Does the test lamp illuminate?

--

Go to Step 10

Go to Step 9

9

Repair the open in CKT 391. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 16

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10

Backprobe from the rear wiper motor connector, terminal E, to ground with a test lamp.

Does the test lamp illuminate?

--

Go to Step 12

Go to Step 11

11

Repair the open in CKT 393. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 16

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12

Backprobe from the rear wiper motor connector, terminal A to terminal E, with a test lamp.

Does the test lamp illuminate?

--

Go to Step 14

Go to Step 13

13

Repair the open in CKT 450. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 16

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14

Inspect for a poor connection at the rear wiper motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 16

Go to Step 15

15

Replace the rear wiper motor. Refer to Rear Window Wiper Motor Replacement .

Did you complete the replacement?

--

Go to Step 16

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16

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Wiper/Washer Rear System Check