GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Saturn 🢒 2002 🢒 L100/L200/LW200 🢒 Body and Accessories 🢒 Doors 🢒 Power Window Diagnosis

Diagnostic Circuit Charts

Symptom

Procedure

All of the windows are inoperative from all switches.

Chart 1

Both of the left windows are inoperable or both of the right windows inoperable.

Chart 2

Only the left front or only the right front window is inoperable.

Chart 3

The left rear or right rear window is inoperable from both the master window switch in the console and from the rear door window switch.

Chart 4

The left rear or right rear window is inoperable from its rear door window.

Chart 5

The left rear or right rear window is inoperable from only the master window switch in the console.

Chart 6

Both of the left rear and right rear windows are inoperable from the rear door window switches.
    • Verify that the rear window lockout switch is in the ON position.
    • If the rear doors will not function when the rear window lockout switch is in the ON position, replace the left master window switch in the console.
    • Check the power window operation from all window switches.

The rear window lockout switch does not lockout the rear door window switches.
    • Verify that the rear window lockout switch is in the OFF position.
    • If the rear doors still function in the OFF position, replace the left master window switch in the console.
    • Check the power window operation from all window switches.

The front window auto down is inoperable.
    • Verify that the auto down feature is inoperable.
    • Replace the left master window switch in the console.
    • Check the motor and replace if necessary.
    • Check for mechanical/binding problems and repair if necessary.
    • Check the power window operation from all window switches.

A window will not go down all the way.
    • Check for a mechanical/binding problem and repair if necessary.
    • Check the ground (BLK circuit 450) between the master console switch, terminal F for the left master switch or terminal B for the right master switch, and a known good ground.
    • Check the motor and replace if necessary.
    • Check the power window operation from all of the window switches.

All Windows Inoperative From All Switches - Chart 1
Object Number: 891020 Size: FP

All Windows Inoperative From All Switches - Chart 1 (Cont'd)
Object Number: 890796 Size: FP

Both Left Windows Inoperable or Both Right Windows Inoperable - Chart 2
Object Number: 890800 Size: FP

Only Left or Only Right Front Window Inoperable - Chart 3
Object Number: 890802 Size: FP

Left Rear or Right Rear Window Inoperable From Both the Master Window Switch in the Console and From the Rear Door Window Switch - Chart 4
Object Number: 890804 Size: FP

Left Rear or Right Rear Window Inoperable From Rear Door Window Switch Only - Chart 5
Object Number: 890806 Size: FP

Left Rear or Right Rear Window Inoperable From Only the Master Window Switch in the Console - Chart 6
Object Number: 890809 Size: FP

Switch Continuity Check
Object Number: 888562 Size: MF

Window/Sunroof Fuse

Location: Underhood Fuse Block

Type: 30A Maxifuse

Feeds: Circuit 402

If one of the following systems is operating normally, the fuse is most likely good:

    • Power Windows
    • Power Sunroof

If the fuse is blown, determine the cause of the blown fuse and repair.

Replace the fuse as needed.

Right Body Ground Splice Pack

Location: Under the console near the park brake.

The systems grounded by the right body splice pack are grounded redundantly with the body ground. If one of the following systems is operating normally, the ground circuit is most likely good.

    • Dome Lamp
    • Center High Mounted Stop Lamp (CHMSL)
    • Reading Lamps
    • Sunroof
    • Power Seat (Driver)
    • Heated Seats (Driver or Passenger)
    • Right Heated Mirrors

Check for any opens or shorts.

Repair as needed.