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 for the door system?

Go to Step 2

Go to Diagnostic System Check - Door Systems

2

Try to operate the power windows.

Do the power windows operate correctly?

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

Go to Step 3

3

  1. Turn ON the ignition, with the engine OFF.
  2. Disconnect the Master Window Switch.
  3. Connect a test lamp between the ignition 3 positive voltage circuit of the Master Window Switch and a ground. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

Go to Step 4

Go to Step 5

4

Connect a test lamp between the ignition 3 positive voltage circuit of the Master Window Switch and the ground circuit of the Master Window Switch. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

Go to Step 6

Go to Step 9

5

Inspect for a poor connection or open in the ignition 3 positive voltage circuit of the Master Window Switch. Refer to Circuit Testing and Wiring Repairs or Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 10

Go to Step 7

6

Inspect for poor connections at the Master Window Switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 10

Go to Step 8

7

Repair the short to ground in the ignition 3 positive voltage circuit of the Master Window Switch. Refer to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 10

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8

Replace the Master Window Switch. Refer to Front Side Door Window Switch Replacement .

Is the repair complete?

Go to Step 10

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9

Repair the poor connection or open in the ground circuit of the Master Window Switch. Refer to Circuit Testing and Wiring Repairs or Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Is the repair complete?

Go to Step 10

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10

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2