My 1964 1010 was having electrical starting issues so we decided to rewire it since there were signs of corroded wiring. I was not interested in premier restoration just functional. I stiill use my tractor as a workhorse. To my question... We know its positive ground system 12 volt. Yet we found the coil to be a 6volt coil. ? We do have a resistor located on backside of dash. The original wiring diagrams do not show this ? Got them of of this forum (thanks again). Does any one know what the deal is with this. Was it simply to knock down voltage to coil and points? Is there any diagrams that show the way it is wired into the system. Thanks Matt O