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Re: Alternator Extra Wire Help
Backtrack the other end of the black wire but I am thinking that you are correct and that is a ground wire to the Ground bolt on the alternator.
I haven't had an external regulator alternator on mine for years as I changed mine to 10 SI and now a 22SI that came with the Cad 500.
The top photo shows the external regulator alternator hookup on my 71 per the wiring diagram from www.classiccarwiring.com The second shot is the wiring diagram
Big enough and plenty nice enough to put up on the wall of the garage by the truck. They aren't cheap but when you get it laminated it is a nice piece to have to refer to.
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Founding member of the too many projects, too little time and money club.
My ongoing truck projects:
48 Chev 3100 that will run a 292 Six.
71 GMC 2500 that is getting a Cad 500 transplant.
77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.
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