Posted by pete 23 on December 02, 2013 at 17:10:24 from (74.33.91.156):
In Reply to: start on farmall m posted by butch49 on December 02, 2013 at 10:41:38:
Like others have said. If the points are closed and making good contact you will have zero voltage reading on the side of the coil that is hooked to the points. Electricity always takes the easiest path so it goes through points to ground. With points open you should read same as on input side of coil as there is no current flowing so no voltage drop. Now with a ballast resistor in the circuit , which you have to have if you have original coil or any 6 volt coil for that matter, you should read battery voltage at input to ballast, about 5 volts on coil side of ballast with points closed. You should also change your coil leads so the negative side of coil is going to the points when you have a negative grounded system.
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