If the battery cable arcs when touched to the battery, (or the other end) and the engine cranks, there is only one thing that can be wrong. The relay (solenoid). when all small wires are removed from that device, it should be an insulator and nothing should get through it. If it does, it is broken. (this includes even the wrong part that looks correct. The one wire setup is simple in that it requires three changes. Bulbs to 12v, coil 12v no resistor required, or 12v resistor required if the original ford system had a resistor wire in the ignition circuit (often pink). The coil needs to be attached with the Negative terminal to the distributor. The last thing is the heavy wire from the new alt (should) go to a 40 amp fuse, or fuse link) then to the positive battery terminal. If you want the amp gauge to work, it needs to go on the load side of the amp gauge. Many of the Ford tractor and early Ford cars had a relay that was turned on by grounding at the starter button. Later ford relays look the same, and are very different, they work by getting 12v to the S terminal. Jim
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Today's Featured Article - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
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