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 systems?

Go to Step 2

Go to Diagnostic System Check - Door Systems

2

  1. Turn ON the ignition, with the engine OFF.
  2. Verify that the window lockout feature is not enabled.
  3. Verify that one or more of the passenger windows is inoperative.

Do the passenger windows operate properly?

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

Go to Step 3

3

Does the inoperative window operate from the driver window switch?

Go to Step 4

Go to Step 5

4

  1. Disconnect the power window switch from the door that has the inoperative window.
  2. Connect a test lamp between the lockout signal circuit at the switch connector and ground.

Does the test lamp illuminate?

Go to Step 13

Go to Step 9

5

  1. Disconnect the window switch from the door that has the inoperative window.
  2. Connect a test lamp between the up signal circuit at the switch connector and the down signal circuit at the switch connector.
  3. Press the appropriate window switch to the up position and to the down position on the driver window switch.

Did the test lamp illuminate when the switch was pressed to the up position or the down position?

Go to Step 6

Go to Step 10

6

Did the test lamp illuminate when the switch was pressed to the up position and the down position?

Go to Step 7

Go to Step 11

7

  1. Reconnect the passenger window switch.
  2. Disconnect the inoperative window motor.
  3. Connect a test lamp between the window motor up control and down control circuits of the inoperative window motor connector.
  4. Press the appropriate window switch to the up position and to the down position on the driver window switch.

Does the test lamp illuminate for the up condition or the down condition?

Go to Step 8

Go to Step 12

8

Did the test lamp illuminate when the switch was pressed to the up position and the down position?

Go to Step 14

Go to Step 16

9

Test the lockout signal circuit to the inoperative window switch for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 20

Go to Step 15

10

Test the up and down signal circuits between the window switches for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 20

Go to Step 15

11

Test the up and down signal circuits between the window switches for a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 20

Go to Step 15

12

Test the up and down control circuits at the inoperative window motor for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 20

Go to Step 13

13

Inspect for poor connections at the passenger window switch in the door with the inoperative window. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 20

Go to Step 18

14

Inspect for poor connections at the inoperative window motor. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 20

Go to Step 17

15

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

Did you find and correct the condition?

Go to Step 20

Go to Step 19

16

Repair the short to ground in one of the up or down control circuits at the inoperative window motor. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 20

--

17

Replace the inoperative window regulator motor. Refer to Front Side Door Window Regulator Motor Replacement or Rear Side Door Window Regulator Motor Replacement .

Is the repair complete?

Go to Step 20

--

18

Replace the inoperative passenger window switch. Refer to Front Side Door Window Switch Replacement - Right Side .

Is the repair complete?

Go to Step 20

--

19

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

Is the repair complete?

Go to Step 20

--

20

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2