GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Power Window Schematics

1

Did you review the power windows operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Doors

2

Verify the fault is present.

Does the system operate normally?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

  1. Disconnect the LF side door window switch.
  2. Turn ON the ignition, with the engine OFF.
  3. Probe the power window master switch lockout signal circuit of the LF side door window switch with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

Go to Step 4

Go to Step 5

4

Repair the short to voltage in the power window master switch lockout signal circuit. Refer to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 6

Go to Step 5

5

Replace the LF side door window switch. Refer to Front Side Door Window Switch Replacement - Left Side .

Did you complete the replacement?

Go to Step 6

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6

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3