GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform A Diagnostic System Check - Door Systems?

--

Go to Step 2

Go to Diagnostic System Check - Door Systems

2

Verify that all of the power windows are inoperative.

Does the system operate normally?

--

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Inspect the retained accessory power (RAP) circuit breaker.

Is the circuit breaker tripped?

--

Go to Step 12

Go to Step 4

4

  1. Disconnect the left front window switch.
  2. Turn the ignition switch to the RUN position.
  3. At the harness connector terminal of the power window switch, use a test lamp in order to backprobe between the battery feed circuit and ground.

Does the test lamp light?

--

Go to Step 5

Go to Step 11

5

Is the vehicle a 2-door vehicle?

--

Go to Step 8

Go to Step 6

6

  1. Keep the ignition switch in the RUN position.
  2. At the harness connector terminal of the power window switch for the left rear window, use a test lamp in order to backprobe between the DOWN control circuit and ground
  3. At the driver's door, operate the DOWN control switch for the left rear window.

Does the test lamp light during operation of the switch?

--

Go to Step 10

Go to Step 7

7

Replace the left front window switch. Refer to Front Side Door Window Switch Replacement .

Is the repair complete?

--

Go to Step 13

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8

  1. Keep the ignition switch in the RUN position.
  2. At the harness connector terminal of the power window switch for the right front window, use a test lamp in order to backprobe between the DOWN control circuit and ground .
  3. At the driver's door, operate the DOWN control switch for the right front window.

Does the test lamp light during operation of the switch?

--

Go to Step 10

Go to Step 9

9

Replace the left front window switch. Refer to Front Side Door Window Switch Replacement .

Is the repair complete?

--

Go to Step 13

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10

Repair a poor connection or an open in the power window ground circuit between the left front window switch and G301. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 13

--

11

Repair a poor connection or an open in the power window battery feed circuit between the left IP accessory wiring junction block and the left front window switch connector. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 13

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12

Repair a short to ground in the power window battery feed circuit or the sun roof module feed circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 13

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13

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3