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Re: Power window issue...need electircal advice
There is no separate power window relay at any of the fuse and relay boxes. The only thing that might be classified as a relay is the express down module but that is part of the left front window switch assembly at the driver's side door.
What is common between the power windows and the power door locks is the 12 volts from the IGN circuits. The door locks are controlled by the body control module (BCM). As a guess you could have a bad ignition switch assembly or there is a intermittent short in the wiring which would take some troubleshooting time and a GM wiring diagram.
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