Can someone give me some troubleshooting steps for a battery drain? If my rig sets for any more than 3 days, my battery will drain. My alternator is putting out good voltage and my battery is testing good. I disconnected all my extra circuits (stereo, lights and such) and it still drains. Not sure how to go about determining what is draining it. Do I buy some type of automotive amp meter and just start clamping it on pos wires?