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Farmall & IHC Tractors Discussion Board

Need Resistor for 12v Conversion - Farmall H


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Posted by Horse-George on February 03, 2008 at 21:46:08 from (204.73.103.253):

My Farmall H came with an AC Delco (chevrolet) alternator. It always worked well until about 6 months ago when it quit charging. I took the alternator to an auto shop who tested it and said it was working fine. It turned out the problem was the resistor, which was molded into the plug that plugs into the alternator. I was able to buy a new plug from the auto parts store, but they did not know what to use for a resistor. A local mechanic told me to install a standard dome or tail-light bulb in the wire, to replace the resistor. It worked fine, but I have been thru 3 bulbs in 6 months. Not from burning out, but because of the location next to the engine block, they bang around and break. I was just replacing a spark plug today, and the ratchet hit the bulb, and once again a broken bulb.

I need to go back to a resistor, these bulbs are not working. Can someone please tell me what I need for a resistor. What OHM, and what WATT. I am familiar with electronic parts, so dont hesitate to get technical.

Is there something specifically made for this application? Is this something I can get at NAPA, or another auto parts store? Or maybe Radio Shack? I mostly just need to know the resistance and the wattage. Also, are they a carbon resistor or a wirewound (or don"t it matter)?

Thanks

Horse-George


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