Check the mega fuse. Take off the stock airbox system, under the T/B should be two huge cables. A plastic peice over them with i think is a 13mm or 10mm bolt. take that off and you should see the mega fuse. I blew mine one time and it killed my alt and battery. after replacing the alt twice (the first one was already dead before I installed it) it still wouldn't charge (i still had my light on though). Some guys from autozone in J'Ville NC helped me determine it was the megafuse. Hope this helps.
