Power windows today no longer only raise and lower windows--there are also mechanisms in place that automatically raise windows when a key is turned and that keep windows locked for child safety purposes. Inside the car door is a series of gears attached a large arm and an electric motor. One end of the arm is attached to the bottom of the window, while the other is wider and has grooves so that it operates as a gear. A smaller gear is fit into the arm and both are attached to a motor. Inside the car door is a series of gears attached a large arm and an electric motor. One end of the arm is attached to the bottom of the window, while the other is wider and has grooves so that it operates as a gear. A smaller gear is fit into the arm and both are attached to a motor. The wiring of electric