An inoperative power door lock can be caused by the switch solenoid wiring problem or mechanical problem within the linkage of the affected door.
Power door lock not unlocking.
Pop the window and door lock switch panel off the door handle.
Great tips for diagnosing a power door lock central locking or key fob issue on bmw and we show you the first steps to take.
If the result of this does not yield any results continue to step 2.
But in more complicated systems that have several ways to lock and unlock the doors the body controller decides when to do the unlocking.
Inspect the fuse that protects the door lock circuit to ensure it is not blown.
When a door ceases to lock and unlock at the press of a button it often means that the door s lock actuator has given up the ghost.
Go to a dealer and they will.
Remove switch panel and inspect wiring.
If any wiring is damaged replace them.
The lock actuator consists of a small electric motor that drives.
You don t want to be kicking yourself later because you missed something so obvious.
Unplug the door lock connectors and inspect to make sure nothing stands out.
Follow lead wire to the door lock actuator.
Replace the key fob.
The body controller is a computer in your car.
7 fixes to try if your car s power door locks won t work 1.
If the power door lock relay fails it will cut off power to the entire power door lock system and may cause them to not function correctly.
If that doesn t solve the problem you may have a faulty key fob.
For vehicles equipped with door lock cylinders the door can still be opened using the key.
Diagnosis if all of the door locks are inoperative start your diagnosis at the fuse box.
Links to buy below.