Ford Ka - central locking problem?

[Noodles1975]

I have recently bought a Ford Ka (R Reg 1998) which when I bought it had central locking (not remote). However, recently it has stopped working. Is it likely that I've done something I shouldn't have and any ideas to rectify the situation?

Would be extremely grateful if someone could shed some light on the problem. Cheers

 

[Spark123]

What are the symptoms of the problem? Just stopped working all together or do the doors open themselves again when locked?

 

[Noodles1975]

Each door now needs to be locked manually either by putting the key in the lock or by pushing in the handle from inside - but they don't all lock simultaneously as before.

 

[Spark123]

I have known there to be problems where the wiring comes out of the door and connects into the body - this part flexes each time the car door is opened and closed causing snapped wires.
Does you car have ABS? (Affects the layout of the fuses only!)