Central Locking problem

[Yeti]

Picked myself up another 406 - facelift 2001 1.8 16v this time. one day i'll get an SRi turbo!

Anyway, the biggest problem with this one is that the central locking doesn't work - at all.

The only key was missing the rubber from the big button and the little surface mount switch was broken.

So I desoldered the switch from the little button, put it in place of the big button, and went out to match it up.

Now when I press the big button there's some relays clicking in the fusebox, but nothing happens at the doors.

It's the same with the key - it doesn't unlock the rest of the doors from any of the locks at all.

So - any suggestions where to start looking, or does anyone have a diagram of the central locking system please?

Thanks in advance again.

[mjb]

What happens when you lock/unlock the drivers door from inside?