The resistor does get hot it is a mini toaster by design. But there should (most often) be no measurable power at the distributor with the key on, not running. This is because the distributor/points and condenser are a ground to the coil. (5% of the time a 4 cylinder 4 stroke engine stops, it stops with the pistons about 1/2 the way up or down. (due to compression rebound) this leaves the points closed, grounding the coil. When running the coil is off 50% of the time and on 50%. This interrupted operation causes the spark in the coil secondary circuit. A 400 gas tractor would be 6 volt originally. If it is now 12volt it has been changed. A resistor before the coil allows the original coil to be used. If there is a wire from the starter relay (2 big terminals and 2 small terminals) that would also be add on to the original, but not wrong. The wire to the Relay should connect to a small terminal with an I next to it. The end of that wire chould go the coil side of the resistor, not the key side. It is an ignition bypass, and a good idea. If the key is switched on for 5 minutes, and the points are closed that resistor will be smoking hot, don't do that. One minute at the most. If the key is on, and the resistor has power at the key (input) side, and no power at the output side (points closed) the resistor has failed. Maybe from keeping it on too long not running) If there is voltage there with the key on, it should be about 40 to 60% of battery voltage (points closed) Jim
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