disconnect the positive side of the battery and insert an ammeter in series between it and the battery cable. If you have a sneak current flowing the meter will read it. Then one by one disconnect eletrical devices and look to see if the ammeter shows the current draw stop after you disconnect it. The culprit will show itself. Curious, do you have a stomp starter with the wire terminal off of the side of the starter contacts that you can feed to the coil for direct battery feed while cranking? I've seen those terminals spin while being tightened and internally you might be making contact to the coil at all times right from the battery.
Last edited by bztguy; 08/16/2013 2:39 PM.