Thanks .would plugging it in tell me about a cable break.sorry I'm not good with electrics.thanks

I've recently bought a 2004 HSE td6.the passenger door would not open.so with help from here I got the door open and fitted new door lock mechanism.and the door still won't lock or unlock nothing.any help would be great please.ive read a few bits resetting ecu.or could it be electrical.help please