Ford Focus central locking problem!!!!!!!!!!!?

Question

I just recentley changed a door on a focus and swapped everything from the old door to the new one. After i had finished the central locking would lock then instantly unlock both doors (3 door), then after a few hours they would lock but it only took 1 press instead of 2, then they went back to unlocking themselves! I disconnected the harness on the driverside and the passenger door locks by using the remote. The driver door doesnt lock even with the key so im thinking it could be both mechanical and electrical as water could have got into the motor or harness and the actual lock seems to be jammed. anybody who could help would be doing me a big favour!

Answer 1

normally its just the switches that go rong
simple test open bonnet
press the switch a few times about 5 to 6
horn will beep
open each door singly and shut horn will beeb
now lock doors with key horn will bleed
now with fob worn will beeb
if non of the above then there is the fault

Answer 2

water in anything electrical or mechanical is a ticket to assured death wich also probably burned out the the computer control for the auto lock system // sounds like u have ur work cut out 4 u // replace all mech and elec