well headlights are not working again. i have soldered the wire in the kill/starter switch twice now. first time the guy at the motorcycle shop did it and it didnt hold for a day. then one of the arnament guys i work with who did 23 yrs in the airforce who is by far the best at soldering did it for me. i mean he took his time and took like and hour to do it which it lasted maybe 2 weeks. and when i started it to head home after work there off. so ive come to realize its not working. so my question is do i have to buy the whole kill switch or can i replace the lower half only?