2003 KIA SORENTO Parasitic battery drain. No problems at first, but now it will not hold charge even overnight. Battery new and holds charge when not installed. Also eats headlights. Changing them every 2 to 3 months. Hazard flasher went nuts about 2 weeks ago, so I charged battery again and it held I drove it about 2 days after. Since then, it's back to a dead battery and needs to be jumped whenever I need to use the vehicle. Any ideas?