How to Fix a Slow Power Window

Written by aryeh raphael
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Slow power windows use an electric motor to turn the window regulator. The electric motor may slowly wear out over time and become saturated with moisture, causing it to operate more slowly than normal. To fix the slow power window, some people may opt to replace the motor, fuse or switch assembly. You do not need to hire a mechanic to fix the problem for you. You can correct this slow motor condition in just an hour with the right tools.

Skill level:
Moderate

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Things you need

  • Replacement fuses
  • Screwdriver
  • Voltage tester
  • Replacement switch assembly
  • Replacement window motor

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Instructions

    Check for Blown Filaments in the Fuse

  1. 1

    Remove your panel door. Remove the screws holding the panel onto the car door with a Phillips head screwdriver. Pull out the fasteners that hold the panel and slowly remove the panel.

  2. 2

    Inspect the fuse near your window to determine if there are any blown fuses.

  3. 3

    Replace the fuses that contain blown filaments by pulling these out of your fuse socket and installing new units. This will prevent further problems with your electric motor while you fix the window.

  4. 4

    Replace the fuses that contain blown filaments by pulling these out of your fuse socket and installing new units. This will prevent further problems with your electric motor while you fix the window.

    Replace Switch Assembly

  1. 1

    Remove your switch assembly from your door panel by prying up a corner with your screwdriver. Place the positive terminal of your voltage tester onto your switch's positive contact (or the terminal that is activated when you press the switch) then ground your voltage tester's negative terminal to your car's body.

  2. 2

    Press your switch and watch the voltage on your display. Less than 12 volts means that not enough energy is making it past your switch.

  3. 3

    Replace the entire assembly by pulling its wiring harness adaptor plug right from your rear and pressing this into your new assembly. Install the new assembly into your door panel and test your window.

    Replace Window Motor

  1. 1

    Remove the door panel and unbolt your window regulator's motor. Turn the arm rest bolts as well as the interior door handle screws counter-clockwise.

  2. 2

    Pull your panel away from your plastic pop rivets holding the metal. Place your panel away from your work area, and locate the window motor at the lower right of your window regulator.

  3. 3

    Remove the window motor by unplugging it from its wiring harness and turning its mounting bolts counter-clockwise.

  4. 4

    Slide out the motor from its regulator gears and replace it with a new one.

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