I bought a transit swb recently and it will not lock, it only has manual locking no remote fob. When I turn the key to lock it the locks all lock then immediately unlock themselves. I bought it privately so no comeback really , other than that it's in pretty good condition and drives great

Blackie, October 2014

Ok so the linkage in the side door was faulty so replaced the lock mechanism but still no joy

Blackie, October 2014

Make sure all doors are correctly closed,check contacts in side door,it is difficult to determine what your fault is but the door cards may need removed to check no door lock/latches are seized,eg linkage and also the drivers door wiring loom between the door and pillar maybe worth checking also,good luck.

cdc, October 2014