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How to Replace the Window Motor on a 1988 Cadillac Coupe Deville

The 1988 Cadillac Coupe Deville offers occupants a wide variety of conveniences, including power windows. At the push of a button, the driver or passengers can manipulate the windows as they so choose. The button sends a signal to the window motor, which then moves a gear on the window regulator. The regulator moves the window up or down, depending on the direction the motor turns it. If the motor malfunctions, the entire system comes to a halt. Anyone with basic auto-repair skills can replace a window motor on a 1988 Coupe Deville in about an hour.

Tools Used: Trim tool, Phillips screwdriver, Packing tape, Socket set

Replace Window Motor

Pry the window switch and bezel from the Deville's door panel with the trim tool. Remove the plug from the base of the window switch by hand.

Remove all the retaining screws from the Deville's door panel with your Phillips screwdriver. Set the screws in one place for easy retrieval when you reinstall the door panel.

Lift the Deville's door panel up and off the door by hand. Set it off to the side, out of the way.

Slide the window glass to the top of the door channel by hand. Tape it to the top of the door channel with packing tape to prevent it from falling back into the door.

Unplug the Deville's wiring harness from the base of the old window motor. Remove the retaining bolts from the motor with your socket set.

Replace the old window motor with the new one by hand. Bolt the Deville's new motor to the door and window regulator using your socket set.

Reinstall the Deville's door panel in reverse of removal. Remove the packing tape before manipulating the Deville's power window.

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