Originally Posted by jsprving
....Does it make sense to have a wire spliced to another that goes to the distributor. .....
I wouldn't think the distributor always has power. The point is, it doesn't matter where the 12vdc comes from. You just want power after you turn on the ignition.
If you use your meter in current mode (series hook up and probably 10amp max) you can stop guessing about "where" the draw is coming from and actually see it. Then just start pulling fuses or wires until it goes away.
How do you charge your batteries?
Did you test the isolators?
When you put the negative lead on the frame and the positive on the small post are you getting 12vdc with the ignition off?