Power Locks: Description and Operation

Battery voltage is supplied to the central door locking actuator at all times from fuse 2. There is a metal rod that links the left front door lock switch and the central door locking actuator. When the left front door lock switch is pushed to lock, the metal rod then pushes the actuator switches inside the central door locking actuator to the lock position. The solid state circuit receives the lock input and then supplies power to the left rear, right rear tail gate lock actuator and right front door lock actuator through the actuator switch.
Each motor is grounded through a diode and limit switch inside the appropriate door lock actuator and through the actuator switch inside the central door locking 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 locks work similarly when the left front door lock switch is pushed to unlock, except that the electrical current goes through each motor in the opposite direction.