Brown IIRC is part of the start circuit. Go look on the starter relay. There should be a brown and a yellow. Brown there EDIT, goes to the starter, and yellow goes to the neutral start sw.
In the early years, like yours, Chrysler rarely changed wire colors in one circuit and rarely used the same color and gauge somewhere else. You have there, what appears to be the same color and gauge as you will find at the start relay.
I would therefore jump to the conclusion that they are part of the same circuit, and would next attempt to prove it.
The horn-wire feed would be Violet
The brushes should be green and blue, the big fat out put should be black.
The 12 ga.brown at the starter relay is supposed to go to the starter and nowhere else.
It seems to me I once changed out a very big alternator in a non-A-body, and it had an extra wire.Yeah, but it was 6 ga black and went straight to ground, and was bolted onto the case on a stud. That was a 100Amp job.
I would also check at the battery for a big brown wire like that; somebody might have run an Ammeter bypass directly from the alternator output stud, to the battery, in an attempt to solve another problem. He might have pirated the brown start circuit wire from another harness.If he did, the other end might still have it's original horseshoe connector, stuffed into the positive battery clamp.
BTW, how well do your pulleys line up; something looks fishy about all those washers stacked up on the mount?
And what exactly are we working on?
Until you figure it out, disconnect it, insulate it, and zip-tie it to something it cannot short to. Maybe something won't be working anymore and then you will know what it does!
