Power door lock
Power door locks are a popular accessory on automotive vehicles. Power door locks provide electrical actuation of the door lock mechanism of a motor vehicle in response to a user pressing a switch. Automotive vehicles have a door latch on each vehicle door to latch the door in the closed position. Each vehicle door latch includes a lock that is commonly actuated from inside the vehicle by a readily accessible sill button or other manually operable device on the door. The power lock system commonly employs an electrically powered actuator associated with each door latch to move the door lock between its locked and unlocked positions. Most power door locks employ motors which lock the vehicle doors when energized by one polarity and which unlock the vehicle doors when energized by the opposite polarity. There are two basic mechanisms that can provide power door lock actuation: a solenoid and a motor drive. Because solenoids are frequently noisy and sometimes actuation is unreliable, motor drives have become the actuator of choice. The locking motors are typically responsive to some form of actuator, such as a push button switch or rocker switch, which applies a voltage of the proper polarity across the lock motors to cause them to lock or unlock the associated doors.
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