Power Window Motor: Description and Operation

WINDOW MOTORS
Each power window motor receives battery voltage and ground from the corresponding door module via 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. 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.

WINDOW MOTORS POWER AND GROUND
Each door module has a separate battery voltage supply circuit, used exclusively for power window motor operation. Although the circuits are separate, they are connected within the rear fuse block, where all are fed by the same PWR WDO 30 amp circuit breaker. Each door module also has a separate ground circuit used exclusively for power window motor operation. Each ground circuit is connected to a ground stake. When a door module drives a power window motor, the door module internally connects these voltage and ground circuits to the appropriate window motor control circuits. These battery voltage and ground circuits designated for window motor operation are in the C1 harness connector of each door module.