The role of Power Window Master Switch

Power window switches allow a vehicle’s passengers to open or close the car’s windows. In most vehicles, there are switches on each door, with a master power window switch on the driver’s side that has control over all windows.
Most basic power window systems have switches that allow power to go through to the power window motor when pressed. The direction power runs through to the motor depends on the direction the switch is pressed, which allows for the window to be opened or closed.

Most window switches are typically made of plastic, with metal wiring and prongs inside. If the internal components get wet enough to saturate the inside of the switch, the water will stay there long enough to corrode and ruin the switch’s functionality.