Power Window Issues

Scott Murphy · Feb 10, 2016

Hey. I have power windows in my 84 GT hatch that do work. New run channels have been fitted but don't solve the issue. The window gets about 1/4 way down and drops before continuing winding down. Can anyone attribute this to anything? The glass was previously broken prior to buying the car. Not sure if this has stripped the gears or something trying to get them down as the car was broken into. Cheers

madspeed · Feb 10, 2016

sounds like stripped gears to me. You should be able to see they by removing the door panel

jrichker · Feb 10, 2016

Here's some help, the most likely cause of you problem is the rollers inside the window motor.

Power Window tips & tricks

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 little.

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

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

mikestang63 · Feb 10, 2016

i suggest replacing those plastic rollers with 1/4-20 hex nuts. They will never grind down.

Scott Murphy · Feb 11, 2016

madspeed said:
sounds like stripped gears to me. You should be able to see they by removing the door panel

Hey thanks. If the gears are stripped are they inside the motor or separate?

Scott Murphy · Feb 11, 2016

mikestang63 said:
i suggest replacing those plastic rollers with 1/4-20 hex nuts. They will never grind down.

Rollers inside the motor or

mikestang63 said:
i suggest replacing those plastic rollers with 1/4-20 hex nuts. They will never grind down.

I will look into that thanks mate.

Scott Murphy · Feb 11, 2016

jrichker said:
Here's some help, the most likely cause of you problem is the rollers inside the window motor.

Power Window tips & tricks

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 little.

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

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

Much appreciated. I will get onto it. Sounds like a fairly cheap fix just replacing those plastic rollers if I read correctly?

Scott Murphy · Feb 13, 2016

Yep....it was the rollers. Just ordered a set for both sides from the states that are machined aluminium. Should last a while longer! And they were the cheapest on all counts incl shipping to Australia. Cheers guys again.

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