Power Locks: Description and Operation

Circuit Description
Battery voltage is supplied to the left door lock actuator at all times from fuse 2. There is a metal rod that links the left door lock switch and the left door lock actuator. When the left door lock switch is pushed to lock, the metal rod then pushes the actuator switches inside the left door lock actuator to the lock position. The solid state circuit receives the lock input and then supplies power to the right door lock actuator through the actuator switch.

The motor is grounded through a diode and limit switch inside the door lock actuator. The solid state circuit will de-energize the relay coil when the limit switches in the door lock actuators move to the unlock position. The door unlock work similarly when the left door lock switch is pushed to unlock, except that the electrical current goes through each motor in the opposite direction.