GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Wiper/Washer System Check?

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Go to Step 2

Go to Wiper/Washer System Check or Wiper/Washer System Check

2

  1. Turn the ignition switch to RUN.
  2. Move the wiper switch to all positions and then to OFF.
  3. Remove the ACCY 15A fuse #2 in the underhood fuse block.

Do the wipers still operate?

--

Go to Step 5

Go to Step 3

3

Test for a short to voltage in the pigtail wires leading to the wiper/washer switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 18

Go to Step 4

4

Replace the wiper/washer switch. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle .

Did you complete the replacement?

--

Go to Step 18

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5

Turn the ignition OFF and then back to RUN.

Do the wipers still operate?

--

Go to Step 7

Go to Step 6

6

Replace the wiper motor. Refer to Windshield Wiper Motor Replacement .

Did you complete the replacement?

--

Go to Step 18

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7

Measure the voltage from the wiper/washer switch connector, terminal A5, to a good ground with a DMM.

Does the voltage measure greater than the specified value?

1.0 V

Go to Step 8

Go to Step 11

8

  1. Reconnect the wiper/washer switch connector.
  2. Disconnect the wiper motor connector.
  3. Measure the voltage from the wiper speed signal circuit, terminal E, of the wiper motor to a good ground with a DMM.

Does the voltage measure greater than the specified value?

1.0 V

Go to Step 10

Go to Step 9

9

Replace the wiper motor. Refer to Windshield Wiper Motor Replacement .

Did you complete the replacement?

--

Go to Step 18

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10

Repair the short to voltage in the wiper speed signal circuit, CKT 478, of the wiper motor. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 18

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11

Measure the voltage from the wiper/washer switch connector, terminal D3, to ground with a DMM.

Does the voltage measure greater than the specified value?

1.0 V

Go to Step 15

Go to Step 12

12

  1. Reconnect the wiper/washer switch connector.
  2. Disconnect the wiper motor connector.
  3. Measure the voltage from the high speed input circuit of the wiper motor to a good ground with a DMM.

Does the voltage measure within the specified range?

10.5-15 V

Go to Step 13

Go to Step 14

13

Repair the short to voltage in the high speed input circuit of the wiper motor. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 18

--

14

Replace the wiper motor. Refer to Windshield Wiper Motor Replacement .

Did you complete the replacement?

--

Go to Step 18

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15

  1. Reconnect the wiper/washer switch connector.
  2. Disconnect the wiper motor connector.
  3. Measure the voltage from the wiper speed signal circuit, terminal G, of the wiper motor to a good ground with a DMM.

Does the voltage measure greater than the specified value?

1.0 V

Go to Step 16

Go to Step 17

16

Repair the short to voltage in the wiper speed signal circuit, CKT 477, of the wiper motor. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 18

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17

Replace the wiper motor. Refer to Windshield Wiper Motor Replacement .

Did you complete the replacement?

--

Go to Step 18

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18

Operate the wiper/washer system and inspect for proper operation.

Did you correct the condition?

--

System OK

Go to Wiper/Washer System Check or Wiper/Washer System Check