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Ol John T
11-25-2002 05:35:34
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Re: Help!:12 volt Ignition problem in reply to Bguy, 11-24-2002 16:11:54
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In additions to clooneys good recommendations, here are some additional thoughts to help you along. Just to be safe, when it was converted from 6 pos to 12 neg ground, was the coil re wired pos to ignition with neg to distributor?? Did you keep the existing 6 volt coil and add a series voltage dropping ballast resistor to reduce the coils input voltage to the proper 6 volts?? As clooney indicated, if you remove the cap and rotor (it doesnt make the coil fire, it just directs its output to the correct pluh at the correct time) and with the coil wire still in the coil but the opposite end (plug wire end) 1/8 from ground, cranking the tractor over (or closing and opening the points manually) should produce a spark, and all thats independant of any plug or cap or rotor problems. If that test dont make a spark and theres voltage at the coils input and the condensor isnt shorted and the points open and close, the coil could be bad. A test I use is to place a test lamp at the coils high input side, and with ignition on it should show battery voltage (or 6 if ballast used), then, place a test lamp on the coils low (distributor) side. When the points are open, you should have voltage present there, but when the points are closed, there shouldnt be voltage there (or very very low) because that point becomes dead ground through the points. Crank her over and a test lamp at coils low side should flash on and off, if she never flashes off, look a the condition of the points for corosion or carbon or pitting and insure the gap is proper allowing them to actually close. If a test lamp at coils low (distributor) side doesnt flash on and off when cranking, but you have voltage at the coils input, its probably a problem in the points. If the lamp does flash on and off there and the condensor is okay, it may be a bad coil. You might also check to insure the condensor itself or a wire on the points isnt shorted to ground somewhere, that could be a simple fix. Let us know. Ol John T Nordhoff in Indiana
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