Pinpoint Test M: A Single Power Window Does Not Operate Correctly - Slow Upward/Downward Window Travel

Glass, Frames and Mechanisms

Pinpoint Tests

Pinpoint Test M: A Single Power Window Does Not Operate Correctly - Slow Upward/Downward Window Travel

Normal Operation

Under normal operation, it should not take longer than 6 seconds for the window to travel to the fully OPEN or CLOSED position.

This pinpoint test is intended to diagnose the following:
- Dirt or contaminants in glass run
- Glass runs not fully seated
- Exterior beltline moulding
- Window regulator and motor assembly

PINPOINT TEST M: A SINGLE POWER WINDOW DOES NOT OPERATE CORRECTLY - SLOW UPWARD/DOWNWARD WINDOW TRAVEL

-------------------------------------------------
M1 CHECK THE POWER WINDOW OPERATION


- Start the engine.
- Monitor the amount of time it takes for the suspect window to operate to the fully OPEN and CLOSED positions.
- Does it take more than 6 seconds for the window to travel to the fully OPEN or CLOSED positions?

Yes
GO to M2.

No
The system is functioning correctly at this time.

-------------------------------------------------
M2 CHECK THE GLASS RUNS AND EXTERIOR BELTLINE MOULDING CONDITION


- Ignition OFF.
- Visually inspect the exterior beltline moulding and glass runs for correct installation or any damage.
- Is the exterior beltline moulding and glass runs OK?

Yes
GO to M3.

No
REINSTALL or INSTALL a new exterior beltline moulding and/or glass run. TEST the system for normal operation. For information regarding the exterior beltline moulding, REFER to Exterior Trim and Ornamentation Testing and Inspection. For information regarding the glass runs, REFER to Door Glass Top Run - Front Door Glass Top Run - Front or Door Glass Top Run - Rear Door Glass Top Run - Rear.

-------------------------------------------------
M3 LUBRICATE THE GLASS RUNS AND BELTLINE MOULDING


- Remove/clean the glass runs and beltline mouldings using a clean cloth saturated with silicone spray. For LH front (Expedition/Navigator) or RH front (Navigator), de-initialize, then initialize the window motor. Refer to Window Motor Initialization Service and Repair. Test the system for normal operation.
- Is the concern still present?

Yes
INSTALL a new window regulator and motor assembly. For information, REFER to Window Regulator - Front Door Window Regulator - Front Door or Window Regulator - Rear Door Window Regulator - Rear Door. TEST the system for normal operation.

No
The system is functioning correctly at this time.

-------------------------------------------------