WTF!!! Bronco Big 3

[ObTechAudio]

Ok, I'm trying to do the big 3 on my buddy's full-size 1992 Bronco 5.8L Windsor, but I am absolutely stumped. The alternator doesn't have a post and plug like I'm used to. It only has two plugs identical to the photo below. Any thoughts on how I can do the big 3? Where the (+) would go?

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[CSCStang]

Now that's a headache. Nothing marked B+ on it?

 

[Kangaroux 5,000+ posts]

Pull out a digital multimeter. Set it to DC 12v. If the two posts you test read a negative value, then you know your leads are backwards. Likewise if the two posts read a positive value then whatever post your red lead is on is indeed the positive.

 

[ObTechAudio]

No, no, no hahaha I know which plug is (+) and which is (-) my problem is they are plugs like wiring harness plugs, not posts. With the traditional post, you can simply slip an O-ring terminal on it and tighten it down with a nut. These, being plugs obviously can't do that. So how can I connect my huge (+) big 3 wire to a plug in the pictures? Can't put an O-ring terminal on a plug (scratching my head)

 

[CJL 10+ year member]

Before doing the big 3 on that bronco, swap that alt with one from a mid 90s Taurus IIRC. Known as the "3g swap". Just have to splice in the 3g alts harness and a plug and make a notch in the broncos alt bracket. Pretty easy to do and it makes a good difference when I did it on mine.

Search "bronco 3g swap" for all the info you need.