How to Replace or Repair a Power Window Motor

February 22, 2012

A blown power window fuse, which is easy to replace, can cause a power window motor to fail. Learn to test and replace power window motor components.

Power Window Down

A broken power window motor will cause the window not to work as designed. Replacing the motor can be done by most do-it-yourselfers.

Tools and Materials

  • A replacement power window motor
  • A screwdriver
  • A trim stick
  • A cloth rag
  • A hex wrench
  • An multimeter

Disconnect the Battery Cable
Remove the negative cable with a wrench and place it away from the battery leads in order to prevent a fire or electrical discharge.

Remove the Window Controls and Trim Cover
Use a plastic trim stick to pry the window control panel away from the trim cover. Disconnect the window controls and remove them from the door. Use a screwdriver to remove the trim cover and door panels from the door to access the window motor. Place the door trim and panels off to the side in order to reattach them after the motor's replacement.

Test the Window Motor
Reconnect the negative battery cable prior to this test. The window motor located in the door is connected with a series of wires. Test the wires with the mini-meter to see if they are any good. Test the motor to determine whether it needs replacing or if the problem is with the wiring. Also test the fuses to the window motor (located in the fuse box), to see if any of them need replacing.

Install Replacement Window Motor
Remove the old motor, after it has been determined it is no longer working. Use the hex wrench to remove the hex bolts from their mount position. Put the replacement window motor where the old one was mounted and attach the wires that were removed from the old motor. Mount the replacement window motor with the hex bolts.

Reattach Door Trim
After installation of the window motor, put the door trim and panels back on the door and attach with screws. Test the installation to make sure that the window raises and lowers properly, and that the window motor is working correctly.

3 Reasons Why a Power Window Fuse Keeps Going Out

Several common problems will cause a power window fuse to go out.

Pinched (Shorted) Wires
This generally happens when work has been performed on one or more of the doors, or when one of the doors has sustained damage. Another reason for shorted wiring is when extra speakers and their associated wires have been added. The wires that supply power to the window switch may have been caught between the door and the panel, or pinched behind the armrest. The wire bundle traveling from the vehicle's main body to the door may have been pinched by the door hinge, causing the internal wires to short together.

An Off-Track Side Window
Vehicle side windows rest in a frame and travel along a track. Thrusting the door wide open can cause the window to fall off its track, especially if the window was partially down at the time. Additionally, once the window channel's weather stripping begins to wear, the window becomes loose, and a sharp bump could cause it to move from its frame. Any time a window has fallen off track, the drive motor can no longer move the window in a smooth, effortless manner. This puts a strain on the motor, and causes the power window fuse to blow from excess current draw. This type of jamming can also occur if the cable/belt that moves the window has broken.

A Faulty Motor
Since the motor is located within the door, it is exposed to water when it rains. When the insulation and weather shields age, they shrink and will sometimes allow water to get inside the motor. When water enters the motor it will cause it to short, and that will cause the power window fuse to blow.

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