My buddy asked me to take a quick look at his new dump truck the other day. It seems the batteriesthere were three of themwere going dead whenever the truck sat over night and he was at his wits end as to what was causing it. He'd had the truck back to the dealership, where they replaced the alternator and all three batteries under warranty. He'd driven the truck back from the shop on Friday night and parked it in a warm garage over the weekend, but come Monday morning, the thing wouldn't even turn over. Obviously, something was killing the batteries, and my suspicion was that it was parasitic draw, but where was it coming from, and what does it have to do with motorcycles?