Central Locking

[Madmitch]

Hi all, I have an 04 Citreon C3 Desire. When I lock the doors all but the back driver's side one's lock. If you pull the handle on the open door it un-locks all the others. Can anyone help please.

[paul.h]

Welcome to the forum.

 

It could be a problem with the lock or maybe the wiring. You could try locking the back door latch around a screwdriver instead of the pin on the body to see if it makes a difference which could suggest an adjustment problem.