I performed the tests suggested here. I have 12.39 with key off. 12.15 with engine running. Does it make sense that current going into battery would be regulated to not overcharge battery? The battery does show close to a full charge. The only wires going to the battery are the neg. and pos. cables. Does the wire connected to the solenoid carry the charge to the battery. No drain was detected from battery when key is off.