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. Operate the passenger window up and down from both the passenger window switch and the driver window switch.

Does the passenger window operate properly from both switches?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Does the passenger window operate from the driver window switch and not the passenger window switch?

Go to Step 5

Go to Step 4

4

Does the passenger window operate from the passenger window switch and not the master switch?

Go to Step 6

Go to Step 7

5

  1. Disconnect the passenger power window switch.
  2. Connect a test lamp between the accessory voltage circuit at the passenger power window switch harness connector and ground.

Does the test lamp illuminate?

Go to Step 16

Go to Step 22

6

Does the driver window operate?

Go to Step 19

Go to Power Windows Inoperative - All

7

  1. Disconnect the passenger power window motor.
  2. Connect a test lamp between power window motor up circuit and ground.
  3. Operate the passenger power window in the up direction from the driver power window switch.

Did the test lamp illuminate?

Go to Step 8

Go to Step 10

8

  1. Connect a test lamp between passenger power window motor down circuit and ground.
  2. Operate the passenger power window in the down direction from the power window master switch.

Did the test lamp illuminate?

Go to Step 9

Go to Step 11

9

  1. Connect a test lamp between passenger power window motor up and down circuits.
  2. Operate the passenger power window in the up and down directions.

Did the test lamp illuminate in both directions?

Go to Step 17

Go to Step 18

10

  1. Disconnect the passenger power window switch.
  2. Connect a test lamp between the driver power window switch up signal circuit at the passenger power window switch harness connector and ground.
  3. Operate the passenger power window in the up direction from the power window master switch.

Did the test lamp illuminate?

Go to Step 14

Go to Step 12

11

  1. Disconnect the passenger power window switch.
  2. Connect a test lamp between the power window master switch down signal circuit at the passenger power window switch harness connector and ground.
  3. Operate the passenger power window in the down direction from the power window master switch.

Did the test lamp illuminate?

Go to Step 15

Go to Step 13

12

Test for an open or short to ground in the driver power window switch up signal circuit. Refer to Circuit Testing and Wiring Repairs.

Did you find and correct the condition?

Go to Step 23

Go to Step 18

13

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

Did you find and correct the condition?

Go to Step 23

Go to Step 18

14

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

Did you find and correct the condition?

Go to Step 23

Go to Step 16

15

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

Did you find and correct the condition?

Go to Step 23

Go to Step 16

16

Inspect for poor connections at the passenger 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 23

Go to Step 21

17

Inspect for poor connections at the passenger 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 23

Go to Step 20

18

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 23

Go to Step 19

19

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

Did you complete the repair?

Go to Step 23

--

20

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

Did you complete the repair?

Go to Step 23

--

21

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

Did you complete the repair?

Go to Step 23

--

22

Repair the open in the accessory voltage circuit. Refer to Circuit Testing and Wiring Repairs.

Did you complete the repair?

Go to Step 23

--

23

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3