New Alternator = Battery Drain
I recently installed a new GM alternator in my '65 Mustang. Eliminating the external regulator really cleaned things up. I had originally tried to go with a one-wire setup, but that was doomed from the start. The 3-wire setup is much better. Now it appears I have a battery drain somewhere. If I leave it sit for a couple of days, the battery is dead. I wired it according to a number of helpful posts on this site - even used an indicator light. Any thoughts on this? Thanks in advance.