Power Window Motor: Description and Operation

POWER WINDOW MOTOR OPERATION

Each power window motor receives battery voltage and ground from the RDM through the window motor control circuits. 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.

Both power window motors also have internal position sensors. These sensors signal the RDM with current window position data. They are supplied both battery voltage and a constant ground source and use two signal circuits to the RDM.