Actuators are commonly found in automobiles to operate different parts of the vehicle. Actautors can operate vehicle's headlights, air conditioning system or auto cruising system. In older model vechicles, the actuators can also control the doors, trunks, or headlight doors. Today, there may be either an electrical actuator or a traditional vacuum actuator in different types of vehicles dependsing on the years and models. Electrical actuators can be operated by the electrical systems while traditional vacuum actuatros rely on the engine vacuum systems.