If you are a car owner who wants to get power locks installed in the car, it would be better to know all about them in advance. The mechanism that unlocks the doors of your car is quite interesting. You need to keep one thing in mind; the power door lock kit is very reliable because it is going to unlock your doors over the life of your car. In some vehicles that come with power door locks, the lock and unlock switch sends power to an actuator that unlocks the door. While in others the body controller of the car decides when to lock or unlock.