The most likely reason the amp meter was bypassed like that is due to the fact the alternator puts out a lot more amperage than the original amp meter was designed for. Gives you a direct connection from alternator to battery. I have wired several alternators over the years using original ammeter and got by most of the time. I just recently put a ammeter for a 66 series IH tractor in my own M to have a high capacity ammeter. It will charge just fine without an ammeter but you cannot tell what it is doing. Some install a voltmeter instead which works well. Only thing is , not many operators know how to interpret a volt meter reading. It will be showing 14 volts for example and everything is normal but operator thinks it is charging full blast when in reality it may be charging only a couple of amps as battery is full charge. On the other hand it cold be showing those same 14 volts and battery taking a moderate charge. When battery is low, voltage will be somewhat lower at same time heavy amperage may be flowing. Confused, well. You have to understand how a battery and electricity function to not be. But, in reality you don't really need to know all about it . Leave that for the mechanics. Just know what is acceptable normal readings. Far as replacing wiring, that is your call. If in tough shape I would.
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Today's Featured Article - Uncle Cecil's Super A Lives Again - by Mike Purcell. A week or so out of most of my childhood summers was often spent with my Uncle Cecil and Aunt Sissie in the small East Texas town of Maydelle on their 80 acre farm. Some of my fondest memories of these visits are those of learning to drive a tractor at the helm of Uncle Cecil’s 1948 Farmall Super A. Uncle Cecil was the second owner of this wonderful little tractor, but it was almost as though he had adopted an infant. The original owner was a man from Minnesota who bought her from a local dea
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