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Glen, I pretty much agree with Bob n the Gents below good advice, heres my take. I dont know what Alternator you have HOWEVER many Delco units have built in Voltage Regulators so if its working good I wouldnt worry about it. It surely has a wire off its main voltage output post up to the load side of the ammeter (if it has an ammeter). If the Ballast resistor is disconnected, it may or may not be correct, depending on why it was removed, but most important WHAT VOLTAGE THE COIL IS RATED FOR. It can still run with no ballast on a 6 volt coil BUT NOT FOR LONG as the coil can overheat plus the points wont last very long and will burn n carbon up prematurely. If the coil gets so hot you can barely lay your hand on it CAUTION it may be a 6 volt coil !!!! For a true 12 volt rated coil, the primary resistance as measured between its lil + and - terminals would be somewhere around 3 ohms, if its a 6 volt coil, it would be in the 1.5 to 2 ohm range. I suggest you inspect the coil for any voltage labels,,,,, measure its primary resistance to see if its a 6 or 12 volt unit,,,,, ,,,if its a 6 volt unit you need to add a series voltage dropping (12 to 6) external ballast resistor of around 1.5 to 1.85 ohms around 30 watts OR ELSE RISK OVERHEATING YOUR COIL AND PREMATURE POINTS BURN UP Post back your findings n any question, Good Luck n God Bless John T Nordhoff in Indiana, retired electrical engineer.
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