Window Motor

How Do Power Window Regulators and Motors Work?

The power window regulator and motor assembly are vital to the operation of your vehicle's power windows. This assembly contains both the electric window motor and mechanical or cable-driven regulator. Power window motor and regulator assemblies receive electrical signals from the power window switch or relay. These signals trigger the motor to raise or lower the windows, while the regulator ensures smooth movement throughout the window's course. This not only allows your windows to be used easily but also prevents the window from falling into the door. A damaged or worn power window regulator or motor can prevent you from easily controlling your vehicle's windows, or could keep the window from moving at all. You may notice unusual sounds from the window motor, such as grinding or ticking noises, or there might be notable resistance while attempting to roll your windows up or down. A decrease in speed or lack of response when controlling your windows may also be a symptom of a faulty window motor and regulator assembly. Your power window switches, relay, and wiring connections could also prevent the window from rolling up or down when using the switch, so it may be necessary to perform further diagnosis to determine if the window regulator and motor assembly need to be replaced before making the repair. If you want to learn more about the components of your power windows, check out our How-To resources on power window system failure symptoms and repair. If you need replacement power window parts, shop O'Reilly Auto Parts to find the right power window regulators, motor assemblies, switches, and connectors for your vehicle.