Replacing a regulator assembly
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Photo 1: Remove the switch panel
Pry out the switch panel and disconnect the electrical
connectors. Then remove the door trim panel.
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Photo 2: Test the motor connector
Reconnect the switch panel and attach the voltmeter test leads to
the motor connector. Then toggle the window switch. If the
switch is good, replace the regulator.
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Photo 3: Remove the window
Remove the glass-to-regulator bolts (if needed, cut
the mechanical cables to raise or lower the glass).
Tilt the window up and out and set it in a safe place.
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Photo 4: Replace the regulator
Remove regulator-to-door fasteners and snake the regulator
out through one of the holes in the door. Install the new
So one of your power windows
doesn’t work. Check the fuse first.
If that’s good, the problem is
either a bad switch or motor or a broken
regulator (the device that actually lifts and
lowers the glass). A shop will charge you
at least a few hundred dollars to replace the motor/regulator,
but you can do the job yourself in
about four hours. Regulators are available online or at auto parts stores.
You need a basic set of metric sockets,
screwdrivers, a drill and most important, a
subscription to an online service manual.
That way, you can download instructions
and diagrams that are specific to your car.
Use our instructions as a rough
guide, and refer to
your manual for
Start the repair by removing all the trim
panel fasteners to access the switch for
testing. Remove the trim panel and peel
off the vapor barrier. A trim panel
removal tool is inexpensive and saves you a lot of time.
Reach into the door panel and disconnect
the power connector to the window
motor (wear leather gloves to protect
against cuts). Connect the leads of your
voltmeter to the two terminals on the connector.
Turn the key to the “on” position
and toggle the window switch up and
down. If the switch is good, you’ll see the voltage reading change from plus-12 volts
to minus-12 volts. That means the problem
is the motor/regulator. If your meter
doesn’t display those readings, you’ve got
a bad switch or a broken power or ground
wire. Download an electrical diagram and
check the power and ground wires leading
to the switch to isolate the problem.
Replace the entire regulator assembly,
not just the motor. Start by removing the
window-to-regulator bolts (have someone
hold the glass while you do this).
Then remove the glass by tilting it away
from the door and lifting it out. Next,
remove the regulator bolts or rivets (drill
them out and snake the old regulator out
through one of the door panel openings.
Reverse the procedure to install the new regulator. Bolt the regulator in place and
then reinstall the motor and window
switch electrical connectors and the window
glass. Test the window for proper
operation. If the glass binds, you may have
to loosen the bolts and make minor
adjustments to the regulator. Then tighten
everything and replace the vapor barrier
and trim panel.
This cutaway view shows the location of the regulator assembly inside the door panel.