I started my thread with the knuckle rebuild. Right or wrong you get the idea.
https://forum.ih8mud.com/threads/75-fj40-ranch-rebuild.969056/#post-10799958
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I had never read this being the reason needing the small draw of the resistor or the bulb. I always thought that you needed it in order for the alternator to excite. Looks like I’ll be putting one in line now. Thanks!
Below is the write up I did on my 75’.
The GM alternator conversion has been a great update for me! The 4 AWG wire directly to the battery really helps when charging under load while using the winch, lights and so on. I've melted the leads to the factory alternator before which may or may not...