got an aftermarket cd player in car. ever since i put it in the battery light comes on when i stop. never did it before. i bought one of those adapter plugs for the car and put it in all nice connections and everything and it sounds great. but there was one wire that didnt connect, id have to take it back out to tell what color it was, io think it was orange or red. The adapter didnt have a spot for it so i made sure it worked and put some electrical tape around it. any ideas