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Old 03-23-2024, 07:14 PM   #8
RustyPile
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Join Date: Dec 2017
Location: Elkhart, Texas
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Re: Power window Buick

Quote:
Originally Posted by kaycee View Post
Yes sir 12 volts all the way to motor
The switches not only apply voltage to the motor, but they also switch the polarity on the motor.. Unplug the harness form the motor and connect a test light to the 2 wires.. Do not connect the light to a ground source.. If all the switches, relays, and wiring are intact and working, the test light will light up when the switches are moved up or down.. If the test light lights up both ways, the motor is bad.. If it light up in only one direction, it's time to dig deeper for switch failure, and/or wiring failure. If ANY of the other windows work as they should, you do NOT have relay problems.

An LED bulbed test light will not work for this test. You have to use one that has an incandescent bulb in it.

Last edited by RustyPile; 03-23-2024 at 08:04 PM.
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