Can somebody tell me where my breakaway switch gets its power from? I hook it up every time I tow but I never really gave much thought as to where it's powered from. If the trailer separates from the TV while towing, obviously the power can't come from the tow vehicle. So I guess its powered from the 12v battery in the battery box on the tounge, or does it have its own seperate battery? If so, where is it located and should I be maintaining it? My trailer is all covered up for the winter so I can't really check it till spring.