I've got door wiring loom from broken car (the one that Ranj broke) and I already modified the loom properly
Central locking was uneasy too
This is because central locking module is controlled by **one wire** (ground=lock, +12V=unlock). If we make it in parallel there is a danger of short circuit in unlikely event when driver and passenger press two different buttons at the same time, i.e. driver press unlock and passender mistakenly press lock **at the same time**. But it is all resolved now.
P.S. I'm undecided about mirror switch though. Don't want to allow wife to play with mirrors. I think I'll connect only dimmer LEDs, but leave the loom from mirror switch disconnected somewhere in the car -- 'for future extensions'