GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Power Window Schematics

DEFINITION: Both power windows are inoperative from both power window switches.

1

Did you perfrorm the Door Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Door Systems

2

Verify that the Power Windows Inoperative - All complaint is present.

Does the power windows system operate as described in the Description and Operation?

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

Go to Step 3

3

  1. Disconnect the LH window switch.
  2. Turn ON the ignition, with the engine OFF.
  3. Probe the RAP relay switch supply voltage circuit of the LH 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

Connect a test lamp between the RAP relay switch supply voltage circuit of the LH window switch and the ground circuit of the LH window switch.

Does the test lamp illuminate?

Go to Step 7

Go to Step 6

5

Test the RAP relay switch supply voltage circuit of the window switches for a short to ground or an open.

Did you find and correct the condition?

Go to Step 9

Go to Retained Accessory Power (RAP) Inoperative in Retained Accessory Power

6

Test the ground circuit of the LH window switch for an open.

Did you find and correct the condition?

Go to Step 9

Go to Step 7

7

Inspect for poor connections at the harness connector of the LH 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 9

Go to Step 8

8

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

Did you complete the replacement?

Go to Step 9

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9

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3