On a vehicle with electric locks the process is a bit different.
Inside door lock actuator.
When the actuator moves the latch up it connects the outside door handle to the opening mechanism.
This small motor is mounted inside the door and unlocks the door when you use your key fob or the button inside the vehicle.
Most power door locks operate using gears or motors that may quietly whir or make noise when they operate.
A small electric motor turns a series of spur gears that serve as a gear reduction.
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Unusual noises coming from inside the door are one of the first symptoms of a potential problem with a power door lock actuator.
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In some cars a door lock actuator becomes noisy and produces a squeaking or buzzing noise when the power door locks are locked or unlocked.
This manipulates a series of rods that slide back and forth opening and closing the locking mechanism at the door latch.
Every vehicle is different so it s important to find the right actuator for your make and model.
If so the problem might be your door lock actuator.
Door lock actuators engage and open your car s power locks.
Unusual noises coming from inside the door.
If the electric motor or the mechanism inside the door lock actuator wears out the door lock may lock or unlock slowly or work sometimes but not all the time.
This system is quite simple.
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A car door in this car the power door lock actuator is positioned below the latch.
How a door lock actuator works on manual locks the locking function operates by pushing or pulling on the door lock.
Those noises are normal.
Inside the power door lock actuator.
A rod con nects the actuator to the latch and another rod connects the latch to the knob that sticks up out of the top of the door.