Power Locks: Description and Operation
Circuit DescriptionWith TACS/With ETACS
Battery voltage is supplied to the power door lock relay #1, #2, #3 at all times from fuse 6. There is a metal rod that links the left door lock switch and the left door locking actuator. When the left door lock switch is pushed to lock, the metal rod then pushes the actuator switches inside the door lock actuator to the lock position.
The ETACM/TACM receives the lock input, controls the two door lock relay coils and then battery voltage is supplied to the door lock actuators through fuse 6 and the two door lock relay contacts. 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 door lock switch is pushed to unlock, except that the electrical current goes through each motor in the opposite direction.