Power Door Lock Switch: Description and Operation

FRONT PASSENGER DOOR POWER LOCK SWITCH
The front passenger door module supplies battery positive voltage and ground to the front passenger door lock switch. Two circuits are provided for voltage, one for a lock signal , and one for an unlock signal. The door module supplies ground to the switch via a third circuit. When the switch is activated for a lock or unlock function, the contacts for that function are closed to ground and voltage flows through the switch, providing the module with the appropriate Lock or Unlock signal input.

DRIVER DOOR POWER LOCK SWITCH
The driver door lock switch is similar to the front passenger door lock switch, but it is wired to the driver door switch assembly (DDSA), and, for a ground circuit, the driver door module (DDM). It also works the same way as the front passenger lock switch works, but the switch signal input information is detected and processed by the DDSA and less voltage is required for operation. The DDSA has two circuits that supply 5 volts to the contacts of the driver door lock switch, one for a lock signal, and one for an unlock signal. The driver door lock switch ground circuit is provided by the DDM. When the switch is activated to Lock or Unlock, the contacts for that function are closed to ground, voltage flows through the switch and is detected by the DDSA. The DDSA then relays the lock switch information to the DDM via the power door serial data circuit.