Ok, will post a couple pics in a few minutes, found a charred wire, the blue one, and also on the regulator, the fusible link on the back is kinda messed up, will try to take a pic of that too. thanks guys
update: Ok, battery is pretty new, the fusible link on the back is still attached but all loose and stretched out in 2 spots. From the other 4 regulators I have, the fusible link is solid. Gonna replace the regulator and blue wire and see what happens, hopefully don't blow another bulb