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Lets not get confused measuring two different ways. To minimize confusion, its better to measure from ground, e.g. the tractor frame. The supply side of the coil gets 6 volts probably -6 volts with the positive battery post grounded. That coil terminal should be the - terminal. The + terminal then goes to the insulated contact of the points. The other point contact is grounded. The insulated point contact and coil + terminal have to change from 0 volts to the 6 volt supply voltage for ignition to work. If the voltage is only 1-2 volts with the points open it won't run. There are four parts that affect that points open voltage. You have already eliminated the coil by unhooking the wire and finding 6 volts on the coil to distributor wire. That points at the wire, the condensor or the points. Connect them one at a time watching for the low voltage condition. With that low voltage while the points are open fixed, you have a chance of it running. Unhook the wire that goes from the high voltage terminal on the coil to the center tower of the distributor from the distributor. Hold that wire about 3/8" from ground and crank the engine or close and open the points. You should get sparks if the coil is good. Blue sparks. If not and the low voltage checks out, then you need a coil. Gerald J.
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