Window regulators can be found on the internal section of a vehicle's door panel. These units carry the glass and also control the height at which it sits. There are two kinds of window regulators - manual window regulators and power window regulators (also known as automatic window regulators). Window regulators create the force to move a window in a vehicle from its current position, either upward or downward. Manual window regulators use a hand crank to move the window up and down, while power window regulators have a switch or button usually located on the arm rest, which when pressed moves your windows up or down.