How Do You Diagnose Car Power Window Problems?
Automotive power windows use a switched motor to operate a mechanical window regulator. This regulator moves the pane of glass into the door. If the windows don’t work, any of several issues is likely to blame, including no electricity, bad switches, bad motor, damaged window regulator, or even a broken wire. The average backyard mechanic can diagnose the cause of power window failure in about 20 minutes. Open the fuse panel and check the fuses for disrupted elements. Most automobile manufacturers place the fuse panel at the driver’s side kick panel, or between the dashboard and the door. German cars typically have fuses in the engine compartment, in front of the driver’s side firewall. Pull the fuse out with your fingers, or with the tool that came with the car and is located in the panel. Look through the fuse’s transparent case for a broken filament. Replace any blown fuses and try the window again. Test the wiring harnesses from the fuse panel to the switches, and from the switches
