Passenger Door Power Window Switches

Each passenger door has a separate power window switch mounted to it. In order to receive a signal from their associated switch, the passenger door modules, (PDM, LRDM, and RRDM) each supply battery positive voltage and ground to their associated power window switch. There are three circuits for battery positive 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 Down 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 Down function, the normally open switch contacts for that function are closed, and voltage flows through the switch, providing the associated door module with the necessary signal.