How Power Door Locks Work

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Here's how power door locks work on your car!

Door locks keep the interior of your vehicle secure. Power operated door locks work with an actuating mechanism controlled by the car's ECU. When you press the power door lock button or your remote, a signal is sent to the lock actuator to move a lever. The lever will in turn disable the door handles, which means the door cannot be opened. Unlike a residential door lock, car door locks don't have a physical pin that blocks the door from opening, it merely disables the handles.

In this video, the power door lock is removed from the door of an Infiniti G35 and completely torn down and examined. The mechanism consist of the actuator cables, the door latch assembly, and the door lock motor and a built in protection circuit.

Find out how a power window works here:


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Toothbrush used in the video:
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Torx bit set:
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Socket set:
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This is the Camera I use:
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