Power Window Switch: Description and Operation

PASSENGER DOOR WINDOW SWITCHES

Each passenger door has a power window switch mounted to it. The passenger door modules, PDM, LRDM, and RRDM, each supply battery voltage and ground to their associated power window switch. There are 3 circuits for voltage between each passenger door power window switch and its associated door module, one for an Up signal, one for a Down signal and one for an Express signal. The door modules each supply ground to their switch via a fourth circuit. When the switch is activated for an Up, Down, or Express function, the normally open switch contacts for that function are closed to ground, and voltage flows through the switch, providing the associated door module with the necessary signal.