Good question. I'm not sure, because mine is one wire so it obvious. They both may be power wires. Or one may be for 6volt and the other may be for 12. When I was researching it, I found a lot of those trucks had alts that were for both 6v and 12v. IDK how close you are to any town...but you could try a generator alternator repair shop. Or a garage that's been around more than a week. The repair shop should be able to tell you. If not, PM me everything you know about it and I can call my guy up here. or i can PM you their number whatever works sweet for ya.
Sorry Brad simultaneous-post. Very good information.
Brad mentioned: "Then you just need a beefy engine to keep it spinning under load." Remember there's 746 watts per 1 horsepower at 100% efficiency. So if it's 60amps times 13.8 volts = 828 watts assuming the alt is 75% efficient multiply 828 by 1.25 (25% waste) and that would give you 1035 watts. So it will take a bare minimum of a 1.4 HP electric to spin it. For gas rule of thumb is "double the gas to equal electric" Needing a 2.8 HP gas. then you engine ins't 100% efficient either, say 60% (40 waste). 2.8 X 1.40 = 3.92 HP..on and on.....belts eat up power... So 5-8 HP should get you started.
Sorry, as if all of us don't get enough math at school and jobs
Reply With Quote