Rear door do not unlock

[jdstrickland]

Originally Posted by andrewwynn

A bit of a distinction without a difference but that is not an accurate statement.

The lock and unlock is performed with the same motor that has voltage applied in opposite direction. For some reason however the brushes wear or whatever, The motor will stall in the unlock direction where it’ll still work in the lock direction near end of life. eventually it won’t work in either direction.

There are no coils involved in the lock mechanism other than I suppose a hall effect coil that is measuring the position of the lock.

Functionally the defect acts as described why I said A distinction without a difference

I accept the distinction. I described a solenoid operation, not a motor. I haven't physically done this job on my E53, but I replaced the door lock actuators that were basically solenoids.

(I have a brand new door lock actuator that is a solenoid laying on my bench. If anybody wants it. send me $20 and I'll drop it in the mailbox to you. I don't even want the money, but I also don't want to cover the postage, so you pay postage...)