ED, any time you have a problem with a battery drain, remove the grounded cable from the battery. Hook up a test light from the battery to ground. If the light , lights, you have a circuit that will drain the battery.. The Brighter the light the more current drain. Simply start unhooking wires, when the light goes out you have isolated the "drain". Narrow it down to find the "problem".
If you have a problem, email me. I am a "retired electrician" and have found a lot of shorts this way.