Central locking and radio not working?

OK so I have Opel zafira 2008 1.6l and central locking is not working, I found snapped wires in the rear doors fixed one or two of them but still two left to fix but wire is not long enough to do a fix. If I manage to fix wires could there be another problem or should it resolve by fixing the wires??? Also the radio has stopped working for me and can't change the time etc.