Ok guys, I have searched the old posts and cant seem to find what I need. Using an internally regulated 3 wire alt as a 1 wire. It drains the battery. If I unplug the small short wire going inside the alt drain is gone. So I think I can either put a diode in that short wire so current will only flow one direction or take the wire to the switch so it is disconnected when switch is off. Is this right?