lidhead

i have owned my troybilt gtx 2446 garden tractor since march of 2003. my headlights have never worked and i have to recharge my battery every other time i mow. i do not think my electrical wiring harness is connected right. is there any way i can look up this up? i have a yellow and a black wire that are not connected to anything, i also have a green wire that comes out by the oil filter(oil sensor?) that is not connected to squat? any suggestions would be very helpful thanks denny from circleville ohio