We just put a new battery in the sled, put in a new voltage regulator, got her all fixed up and ready to roll for the season. We trailer the sleds, get up north and my battery is dead. Throw a charger on it, sled works fine. Later in the evening (3 hours later), we walk past it and realize the lights are still on. There is no key (pullstart only). Kill switch is hit to turn it off. Pulling the dess key doesn't turn the lights off. Any ideas of what to check to fix this?