GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Power Window Schematics

Connector End View Reference: Power Door Systems Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

  1. Turn ON the ignition, with the engine OFF.
  2. Activate the driver power window from the master switch.

Does the driver power window operate normally?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Operate the passenger window from the driver switch.

Does the passenger window operate properly?

Go to Step 4

Go to Power Windows Inoperative - All

4

  1. Disconnect the driver power window motor.
  2. Connect a test lamp to ground.
  3. Probe the driver power window motor left front up circuit.
  4. Activate the driver power window switch in the up direction.

Does the test lamp illuminate?

Go to Step 5

Go to Step 7

5

  1. With the test lamp still connected to ground, probe the driver power window motor left front down circuit.
  2. Activate the left front power window switch in the down direction.

Does the test lamp illuminate?

Go to Step 6

Go to Step 8

6

  1. Connect a test lamp between the driver power window motor up and down circuits.
  2. Activate the left front power window switch in the up and down directions.

Does the test lamp illuminate in both directions?

Go to Step 10

Go to Step 9

7

Test the driver power window motor left front up circuit for an open or short to ground. Refer to Circuit Testing and Wiring Repairs.

Did you find and correct the condition?

Go to Step 13

Go to Step 9

8

Test the driver power window motor down circuit for an open or short to ground. Refer to Circuit Testing and Wiring Repairs.

Did you find and correct the condition?

Go to Step 13

Go to Step 10

9

Inspect for poor connections at the driver power window switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs.

Did you find and correct the condition?

Go to Step 13

Go to Step 11

10

Inspect for poor connections at the power window motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs.

Did you find and correct the condition?

Go to Step 13

Go to Step 12

11

Replace the driver power window switch. Refer to Front Side Door Window Switch Replacement.

Did you complete the repair?

Go to Step 13

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12

Replace the driver power window motor. Refer to Power Window Motor Replacement.

Did you complete the repair?

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 2