Power Window Motor: Description and Operation

WINDOW MOTORS
Each door module applies battery voltage and ground, through the window motor control circuits, to its associated window motor. The window motors are reversible. The direction the window moves depends on which motor control circuit the voltage is applied to, and which motor control circuit the ground is applied to. To move the window in the Up direction, the module applies voltage to the window motor Up control circuit, and ground to the window motor Down control circuit. When a window movement in the opposite direction is needed, the module reverses the polarity and applies voltage and ground to the opposite circuits to move the window in the reverse direction. During a window Express operation, the door module applies the voltage and ground to the window motor until the window is either fully open or fully closed.