GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you review the Wiper/Washer System Description and Operation and perform the necessary inspections?

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Go to Step 2

Go to Symptoms

2

  1. Turn the ignition to RUN.
  2. Set the wiper switch to LO.

Do the wipers stop for approximately 6 seconds and then operate for approximately 24 seconds repeatedly?

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Go to Step 3

Go to Step 4

3

Replace the wiper motor cover. Refer to Wiper Motor Cover Replacement .

Is the replacement complete?

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Go to Step 15

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4

  1. Set the wiper switch to OFF.
  2. Disconnect connector C202 from the wiper/washer switch connector.

Do the wipers park properly?

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Go to Step 5

Go to Step 6

5

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

Is the replacement complete?

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Go to Step 15

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6

Measure the voltage from connector C202 (vehicle side), terminal A5, to ground using a J 39200 .

Is the measurement greater than the specified value?

1.0 V

Go to Step 7

Go to Step 10

7

  1. Reconnect connector C202 to the wiper/washer switch connector.
  2. Disconnect the harness connector from the wiper motor.
  3. Measure the voltage from wiper motor connector (harness side), terminal G, to ground using a J 39200 .

Is the measurement within the specified values?

10.5-15 V

Go to Step 8

Go to Step 9

8

Repair the short to voltage in CKT 478.

Is the repair complete?

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Go to Step 15

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9

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

Is the replacement complete?

--

Go to Step 15

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10

Measure the voltage from connector C202 (vehicle side), terminal D3, to ground using a J 39200 .

Is the measurement greater than the specified value?

1.0 V

Go to Step 12

Go to Step 11

11

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

Is the replacement complete?

--

Go to Step 15

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12

  1. Reconnect connector C202 to the wiper/washer switch connector.
  2. Disconnect the harness connector from the wiper motor.
  3. Measure the voltage from the wiper motor connector (harness side), terminal H, to ground using a J 39200 .

Is the measurement greater than the specified value?

1.0 V

Go to Step 14

Go to Step 13

13

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

Is the replacement complete?

--

Go to Step 15

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14

Repair the short to voltage in CKT 477.

Is the repair complete?

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Go to Step 15

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15

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Symptoms