GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 LeSabre 🢒 Body and Accessories 🢒 Doors 🢒 Power Windows Inoperative - One

Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

  1. Checks for window switch input recognition by the door modules.

    2.

  2. Checks driver power window switch operation.

    3.

  3. Checks for an open passenger power window switch ground.

    4.

  4. Checks for an open passenger power window switch signal circuit.

    5.

  5. Eliminates the ground circuit as the cause.

    6.

  6. Eliminates the signal circuit as the cause.

    7.

  7. Checks for inoperative window motors.

    8.

  8. Eliminates the window supply and ground circuits as the cause.

    9.

  9. Eliminates the window driver circuits as the cause.

Step

Action

Yes

No

Important:: This test assumes that all DTCs have been diagnosed.

1

Did you perform the Door Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Door Systems

2

  1. Install a scan tool.
  2. Turn ON the ignition leaving the engine OFF.
  3. Observe the power Window Switch parameters in the Driver Door Module data display, Inputs data, using the scan tool.
  4. Activate each power window switch.

Do all parameters change to the up, down, and for the front door window switches, the express states?

Go to Step 11

Go to Step 3

3

Does the driver door window switch parameter indicate all four states (Idle, Up, Down, Express Dwn.)?

Go to Step 5

Go to Step 4

4

  1. Activate the driver power window switch.
  2. Observe the Driver Window Switch parameter using the scan tool.

Does the Driver Window Switch parameter change to any state other than Idle?

Go to Step 16

Go to Step 15

5

  1. Activate the passenger power window switches.
  2. Observe the Pass. Window Switch , Lt. Rear Window Sw., Rt. Rear Window Sw. parameters using the scan tool.

Do the parameters change to any state other than Idle?

Go to Step 6

Go to Step 7

6

  1. Turn the ignition OFF.
  2. Disconnect the passenger power window switch harness connector(s).
  3. Install a 3 A fused jumper in the harness connector(s), between the switch ground and the signal circuit of the window state that did not respond.
  4. Turn ON the ignition leaving the engine OFF.

Does the power window switch parameter(s) indicate the missing state?

Go to Step 9

Go to Step 8

7

Test the ground circuit, of the inoperative switch, for an open circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 17

Go to Step 15

8

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

Did you find and correct the condition?

Go to Step 17

Go to Step 15

9

Inspect for poor connections/terminal tension at the inoperative power window switch harness connector. 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 17

Go to Step 10

10

Replace the inoperative power window switch. Refer to Rear Side Door Window Switch Replacement or Front Door Switch Replacement .

Did you complete the replacement?

Go to Step 17

--

11

  1. Choose each power window, in the power window Test application, of the Output Control application, of the Special Functions in the Driver Door Module data list using the scan tool.
  2. Command the power window to move up and down.

Does each power window move up and down when commanding UP and commanding DOWN?

Go to Step 17

Go to Step 12

12

Test the power window supply and ground circuits of the window(s) that do not move up and down for shorts and opens. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 17

Go to Step 13

13

Test the power window motor circuits of the window(s) that do not move up and down for shorts to each other and to ground or opens. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 17

Go to Step 14

14

Replace the window motor for the windows that do not move up and down. Refer to Front Side Door Window Regulator Motor Replacement or Rear Side Door Window Regulator Motor Replacement .

Did you complete the replacement?

Go to Step 17

--

15

Inspect for poor connections/terminal tension at the inoperative passenger door module or driver door switch assembly harness connector. 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 17

Go to Step 16

16

Replace the driver door switch assembly or passenger door module that fails to respond to the power window switch signals. Refer to Front Door Switch Replacement or Door Control Module Replacement .

Did you complete the replacement?

Go to Step 17

--

17

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2