Mark Houlahan
Brand Manager, Mustang Monthly
July 1, 2003
Photos By: Johnny Click-Click
The replacement power-window motor assembly from Latemodel Restoration Supply comes complete with instructions, adapter bracket (necessary for Mustangs), hardware, and miscellaneous bits required for certain applications.

Horse Sense:
Some Ford applications require drilling holes in the sheetmetal door structure or removing the window regulator to access the power-window motor retaining hardware. But Mustang window motors are easily accessed via a stamped opening in the door and removed through the door-speaker opening. Who says Mustang owners don't have it easy sometimes?

You pull into your favorite burger joint for that anticipated lunch-time escape from work. Pressing the power-window switches on your door, you look over to see the passenger window just sitting there. What the...? You push the switch for the window back and forth, clicking it like a madman, but nothing happens. All you want to do is put up your window and lock your Mustang so you can go eat and talk about office politics and your boss. So, what's going on? You, my friend, have a bad power-window motor.

There are several reasons window motors can ruin your day. The most common problem is failure of the plastic drive-gear bushings. While gravity will allow the window to go down easily, it will have difficulty coming back up as the stripped gear can't overcome the weight of the door glass. Usually, pulling the glass by hand will allow it to come back up temporarily. Another common window-motor malady is electrical failure. While many things can lead to such a failure, it's most likely due to the armature and brushes making poor contact from wear. Whatever the case, the motor needs to come out for repair or replacement.

Probably the most common repair items with regard to window mechanisms in Mustangs are these plastic gear assemblies. Even SN-95 Mustangs are prone to these pieces failing. Look carefully at the assembly and you will see bushings supporting the steel gear within the plastic gear. LRS sells these separately if that's all your Mustang needs.

It's difficult to believe, but many of the daily drivers on the road right now are 11-15 years old. For this story, the problem child is Editor Steve Turner's purple notch. The passenger window has been giving him trouble-to the point he's hesitant to lower it on the chance he won't get it back up (hold the Viagra jokes). The notch is an '89, meaning this daily driver is 14 years old, and both power-window motors are the originals. With a service life of nearly a decade and a half, who could complain? Still, the problem needed to be remedied.

Because Steve took a much needed sanity break (i.e. vacation) right in the middle of doing this project, we decided to grab the next available running Mustang-yours truly's '90-to perform the repairs. The right-side window on my car also worked slowly, although it wasn't as bad as Steve's, which would often not work at all and would have to be beaten to get running again.

Thanks to a replacement power-window motor assembly from Latemodel Restoration Supply, we were able to fix Steve's '89 upon his return to work. LRS even sent enough spare parts to fix the window motor in my '90 as well. Sounds good to me!

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