Hi gents, trying to wire up my Garmin Montana, through the side light feed so it becomes live through the ignition. Problem is I can't manage to get the sat nav to power up despite having power in the cradle. Is it a cambus system, although I don't understand that system, am I overloading those little wires ? If I power straight from the battery it works fine. Sorry for sounding a bit thick, but I'm not a sparks, and dont really understand electrics. If someone could tell me what im doing wrong, or a better way of wireing it I'd be really grateful. Thanks in advance.