Bob, there are one wire versions of this beast, mostly aftermarket. In a message dated 1/30/2005 11:44:00 AM Eastern Standard Time, BobHelt@aol.com writes: > I've installed a Delco SI 10 one wire alternator in my LM. > It has a current drain of the battery when off. > Jeff, The 10 SI alternator is a THREE-WIRE alternator. How have you got it hooked up? Regards, Bob Helt