Electric power makes window-rolling easy. It can be a pain to roll your windows with a crank, and driving’s easier when your window motor does it for you. Until it works only when it wants to. Why do power windows do this? And what can you do to fix it?
Depending on the model and the options that you have on your master power window switch panel, one of three or four parts will cause the issue.
Some vehicles have a slew of power options that send signals to the computer from the switch. Sometimes it’s just the computer that’s faulty, intermittently sending signals to your motor, and leaving your windows only working part of the time. As you may have guessed, automotive computers are pretty complicated. If you have problems with your computer, you’ll probably have to take your car to a reliable shop to get your issue sorted out.
Sometimes the problem is with a defective switch, and sometimes it’s with a defective connector. You can pry the window switch up from the door panel and disconnect the connectors. Check the wiring harness for corrosion. Sometimes this can be cleaned, and sometimes it will need to be replaced. If the connector is fine, it may be the switch. Moisture is tricky and can sneak inside the switch and connector if outside elements manage to get in the door panel.