I'm pretty sure everyone is wrong and the true fix for this issue is to move to Southern California, then you'll never need to worry about the window being down all the time.

The motor has two wires, hook them up one way the motor goes down, hook them up the other way the motor goes up. I'd test this to make sure your motor does or doesn't work. Then proceed with the switches. In my experience most often it's a switch issue, dirty or broken.

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