How to Replace a Window Motor and Regulator

Easy step by step guide on how to replace an automotive window motor and regulator, though the configuration may vary slightly the process is the same, this information pertains to most vehicles.

Difficultly Level - 4

Begin the vehicle on level ground, engine "OFF" with the parking brake set, using a basic set of tools while wearing gloves and protective eye wear. (Warning; Some older electric window regulators are equipped with a helper spring that can have tension, use caution when disassembling.)

Tools and Supplies Needed

• Test light
• Metal scribe or equivalent
• Test wire leads w/clips
• Screwdriver set
• Protective gloves and eye wear
• Torx driver set

Step 1 - To access the window regulator and motor assembly the door panel must be removed. Visit - Complete guide on door panel removal.

Step 2 - Gently remove the plastic door cover, this cover is used to keep moisture away from the door panel.

Step 3 - Locate the window mounting bolts, the window may need to be raised or lowered to access these bolts.

If the window motor is non operational grasp the window to force up or down to gain access, or use a small wrench or socket to remove inside the door frame.

Step 4 - While having a helper supporting the window, remove the window mounting bolts from the window regulator, once the bolts have been removed the window will become loose in its track and door frame.

Step 5 - While the glass is loose in its track, raise the window until it contacts the upper portion of the frame.

Step 6 - While holding the window in place, use masking tape to secure the window from dropping down and possibly breaking inside the door.

This step keeps the glass out of the way while removing the regulator and motor.

Step 7 - Locate and remove the window regulator bolts, now gently allow the regulator to sit inside the door until the motor is removed. (Note: They are connected to each other with cables.)

Step 8 - While the regulator is resting inside the door, locate and remove the window motor mounting bolts. (Note: In this application the bolts can be loosened to remove.)

Step 9 - After both the motor and regulator bolts have been removed, locate the motor wiring harness connector, press the release tab to disconnect.

Step 10 - Remove the regulator and motor assembly through the large access port.

Step 11 - Window regulator and motor removed.

Step 12 - Match the old unit to the new to ensure a proper installation. (Note: Check the electrical connectors as well.)

Step 13 - Gently feed the new motor and regulator assembly back into position, this can be a little tricky so hang in there.

Step 14 - Once the motor and regulator has been re-positioned, re-install all mounting bolts leaving them loose until all have been installed.

Step 15 - Using a ratchet or wrench tighten the motor and regulator mounting bolts.

Step 16 - Feed the electrical connector through the access hole and reconnect it to the door wiring harness.

Step 17 - While holding the window in place, remove the masking tape and lower the window into the new regulator.

Step 18 - Once the window is lowered into place, thread in and tighten the mounting bolts. You may need to turn the ignition switch "ON" and work the window switch to position the regulator cradle so the mounting bolts can be installed.

Step 19 - Recheck all mounting bolts for tightness and re-install the plastic weather liner and door panel assembly.

Step 20 - Once the job in complete, turn the ignition switch to the "ON" position and test both up and down actions of the window motor.

Helpful Information

Electric windows are controlled by three main parts; motor, regulator and a control switch which can fail in many ways, some of the more popular failures include non operation (stuck), window loose in its track sitting down in the frame while the motor turns.

In some cases there are minor adjustments for the window rails to re-position the window if needed, check vertical operation for hard spots or clicking noises.

All power window system are protected by a fuse which should be checked if the window is non-operational. Fuse testing

Common Problems

• The window motor can short out and stop working, or work very slowly.
• The control switch short circuits, due to excessive amperage draw from a worn out motor.

Related Links

• Door panel removal
• Fuse testing
• Window switch testing