Some quick help please - alternator wires

Feb 07, 2004 11 Replies
J

While preparing to install a battery isolator, the wires on the alternator fell out of the plug. Can someone confirm the position of the two wires in the nylon plug to back of the alternator? A large gauge red and a smaller brown wire are in question. The red also ties back the alternator output post. The red I assume to be the excite and the brown maybe the volt meter?


-- JimG



80' CJ-7 258 CID
35" BFG MT on 15x10 Centerlines D44 Rear, Dana 30 Front. SOA
4.56 Gears, LockRight F&R Dana 300 w/4:1 & Currie twin sticks Warn X8000i w/ dual batteries

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J

Thanks Bill, but mine is a Delco. I am looking for the particular A & B wire positions in the nylon connector. A picture of a 258/alternator installed would show it.

JimG

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M

The brown wire goes into pin 1 and the red in pin 2.

On mine pin 2 is the one farthest away from the main power line.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's

JimG wrote:

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J

Now your talkin'... thanks Bill.

JimG

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J

That confirms my guess... Thank's Mike!

JimG

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J

Mine is internal regulator, like the 7-2A schematic in your link. Only difference is the white color and markings 1 & 2 instead of brown and A & B (oddly enough A=2, B=1). The A & B markings are on the nylon connector itself BTW.

JimG

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M

The brown wire gives it away to me...

Mike

"L.W.(ßill) Hughes III" wrote:

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M

They are strange. I have heard of some that have reversed pins in the alternator or maybe now that you mention the a and b, maybe just arse backward on the plug vs the alternator case.

I didn't pull the plug to see how it was labeled, just looked at the numbers cast into the alternator case.

If you get it wrong, the engine just won't shut off, no biggie.... Pull the plug and switch them.

Mike

JimG wrote:

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J

Thanks Mike.

JimG

258/alternator
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