Need help power window problem on 91 lx

Motor removal & replacement
Remove the door mounted speaker & the upholstery panel to gain access to the motor. There are 3 screws (5/16" hex head, I think) that secure the motor in place. Remove them and the motor comes out without any problems. Once you remove all the screws from the motor, and it falls away from the gear teeth on the arm for the glass, the glass will move up and down. You may need a helper to hold the glass once the motor screws are out, since the gear on the motor holds the glass from sliding up or down

Motor interchange
The motor is the same for left side or right side, only the gearboxes are different. If you can't find the complete assembly for the side you want, you can get either side and use the old gearbox on the new motor.

The window motor gearbox has 3 plastic rollers that are a safety clutch to prevent possible injury if the window is rolled up while something or someone is hanging out the window. The plastic rollers will often disintegrate into chunks of plastic and the window will no longer roll up or down. The motor runs, but the window does not move or only move a lttle.

The Help! section of your local auto parts store will have the replacement plastic rollers.
See NAPA Window Regulator Gear Plug

View attachment 204664

Napa p/n BalKamp 6651524

Cost is 9.49$

AutoZone and other auto parts stores see Dorman 74410 / Window Lift Motor Gear Kit
Cost is $7.99

Power Window Wiring Diagrams
Diagrams courtesy of Tmoss & Stang&2birds
87-92 model cars power window wiring:
http://www.veryuseful.com/mustang/tech/engine/images/mustang87-92 PowerWindowWiring.gif

93 model cars power window wiring:
http://www.veryuseful.com/mustang/tech/engine/images/mustang93PowerWindows.gif

See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host) for help on 88-95 wiring Mustang FAQ - Wiring & Engine Info Everyone should bookmark


Don't waste your money on door lock actuators from some expensive Mustang specialty store. There is a better way...


Follow this link to fix your door lock actuator problems: Mustang Door Lock Actuator Retrofit

Stuck with door lock actuators that don't work and don't want to pay the $50+ for a new one? Tried the junkyard ones and found that they last six months and freeze up?

A new actuator for less than $5. Fix one side for $18, do both sides for only $25. I don't sell parts, I don’t make any money off of the upgrade, I just tell you how to do it cheaply and easily.

Here’s a picture of the new actuator installed:

Just had to do the driver's window motor myself. First they slow, then they just don't go.