On manual locks the locking function operates by pushing or pulling on the door lock.
Car door lock actuator kit.
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On a vehicle with electric locks the process is a bit different.
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A rod connects the actuator to the latch and another rod connects the latch to the knob that sticks up out of the top of the door.
In some cars the door lock actuator is positioned below the latch.
How a door lock actuator works.
This manipulates a series of rods that slide back and forth opening and closing the locking mechanism at the door latch.
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These power door lock actuators can provide a power door lock to a door that has manual door lock.
One of these actuators will be needed for each door you want to control.
The actuator responds to electrical signals from the alarm or keyless entry system and physically moves the vehicle s door locking rod to a locked or unlocked position.