hey guys the back door on the drivers side of my territory is not locking all other doors and the back are locking its all the same if i use the button or the key any help on this would be much appreciated ty

Sounds like you need to replace the rear door lock and actuator.
Buy new from Ford part Number SX A26412 A $128.00 or
your local wreckers.

yh i was thinking it be somthing like that was just hopeing there be a cheap fix but that not to bad thank you