New charging problem
bvt: Actually I did the same thing a few years ago when I upgraded to my FBO ignition.
The testing I did was with the radio/amp off, no power draw aside from that for the memory.
A few people that I have talked to today have indicated the battery as a possibility. It is a Red Top Optima, but it is probably 5 years old, and it has been killed off (ABSOLUTELY dead) a few times. Maybe it's just on it's last legs after being abused so badly.
I cranked it up a few minutes ago. It was reading 12.29v at rest, but dropped down to 9.6v while cranking (started with minimal cranking)...then it charged at 14.64v at 1500rpms.
Just for testing, I think I will let it slow charge all day/night and see how it works in the morning....if the voltage appears normal, then I guess the battery was low/is dying.