Alternator Output Wire Melted

Hey all,
I have been fighting an electrical gremlin for a while and it just ate alternator #3. Before I try alternator #4 I wanted to get some advice. This past time my battery light would come on when accelerating from a stop and go off. Upon getting home I see the nut holding wire on top of the alternator (the output I think) glowing red hot. After trying to get it off it takes the post with it. From what I understand this happens when the connected between this wire and the alternator isn't great and the added resistance heats the post.
Now before I go either DIY or shop I mostly wanted to see what the output wire is called (so I can order it, its partially melted and in rough shape) and if that sounds like the right diagnosis.

Thanks y'all

edit - to specify alternator 1 died, 2 may have also suffered the same fate as 3, not totally sure

 

Assume you are talking about the wire to the B terminal. Check that wire and the positive battery leads for corrosion. Also be sure the B terminal nut wasn’t overtorqued shorting the wire or too loose creating resistance and arcing. You should also test the alternator to make sure it is functioning correctly.

 

I'm going to guess your 1st step should be replacing the cables. I suspect corrosion inside the wire OR a pinched/rubbed thru wire is your issue.

But beyond that, if you're not using authentic Denso alternators, you're making a huge mistake. Aftermarket alternators are complete and total horseshit for these trucks. Never buy store brand parts, they absolutely suck these days in quality/QC, and never buy your parts on scAmazon or fleaBay.

I know it's probably hard to believe, but I could pull up a dozen or more threads pretty easily where people had massive failures buying store brand, even quality aftermarket brands, specifically with coils, fuel pumps, starters, and alternators with these trucks. Not blowing smoke up your ass here.