I have to take a few guesses here. If the idiot light is wired one side to ign so its hot when key is on and other side to the alternators little No 1 terminal (works also to supply excitation voltage plus prevent run on like if a diode is used) yes it works and glows as it sees a ground via the alternator when its not running as Jim better explained. As long as the No 2 sense voltage wiring is good and the ground is good, if the light glows dim when running Id suspect an alternator internal problem such as its internal regulator or diodes or slip rings etc but I cant say for sure just what....
John T (NOT an Alternator expert, Im only DC certified lol)
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Today's Featured Article - Fabrication (Who Me? Make it myself?) - by Chris Pratt. First of all, what are the reasons for not fabricatin your own parts? Most judgements on what should be purchased rather than fabricated stem from: Originality - If the tractor restoration is to be 100% original, it is likely that you should spend the time and money to locate the component in the used or New-old-stock market. Since this can be extremely difficult, you may want to fabricate the item or purchase a modern replacement temporarily, but eventually, you s
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