Well, can't see any burnt out wires, so either no wires were affected, or I've gotta pull my dash to bits

Gonna go and get another ignition system relay (or whatever they are called) as soon as I can get a lift to Euro Car Parts, the battery seems flat again, and theres no one to jump start me at the mo....
If I was to do a dash swap with one of the newer (not brand new) polos, would all of the electrics inside the car basically be made brand new?
Because I love the look of my car, just hate the look of the dash and the way the heater didn't work to begin with...