Electric Adjustment This window regulator is for the electric window winder system, typically this system has a button or set of buttons inside the door similar to the picture to the left of this. Window Regulators A window regulator, sometimes known as a window lifter or window mechanism is the mechanical apparatus inside your door that lifts the window when you press a button or in some older cars when you turn the winder. These regulators are quite a common failure in some cars, they can fail due to icing in winter or just through time.