yeah im definatly gonna hook it up first. See what she will do. If i had to guess from what it was out it will be about a 50 amp. Because it was out of a 70s truck. So it didnt have a whole lot of power consumption. And o i see what you mean. Without it hooked to a battery where the positive goes it might not activate the regulater. And I would really like to do that. Be really nice having that extra power.