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Old 09-11-2010, 09:39 PM   #1
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alternator wiring

hey guys I am having a bit of a problem wiring the alternator in my 75 cj5. it's a delco alternator, three wire, I think. I've wired damn near everything in there but that specific item and I just cant get it right. I've got a 232 i6 under the hood

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Old 09-13-2010, 02:45 PM   #2
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well... depends on your alternator...

does it look like this?



If so, then look at the back (non pulley side) and turn it so the connector with two spades way inside are at the top...

the left spade goes to a charging indicator lamp (You NEED it, I wired up a plain jane generic lamp, an LED will NOT work)

the right spade goes to a small insulated bolt to the left side (see picture... it's a lousy image, but it works) NOTE- The primary wire going to your battery ALSO goes here, so don't tighten it up too tight right away

If you don't have the plug from the alternator ask at o-o-o-o' reilly's or auto zone for an "old school AC delco plug" and hope somebody there understands that (they'll NEVER figure it out any other way).

on the far right side is a threaded hole... that's the ground. it *should* work without grounding, but best to be safe.

Final connection is to that insulated post on the left... you should have a small wire from the spade connection going to it, and you need to add a primary going to your battery.


If your alternator doesn't look like that, then I have NO clue. The only reason I can rattle this off is because I wired my DJ from scratch. (ever seen a wiring harness for a DJ-5? heck, ever seen ANYTHING for a DJ-5? I'm lucky I don't have to make my own brake pads out of coconut shells and super glue...) It was great fun figuring all that out, but it HAD to be done, it was originally built with self resetting circuit breakers and someone had removed and bypassed ALL of them. I also got to make my own dash out of diamond plate [ever seen a dash for sale for a DJ-5?] and got a very good object lesson in always carrying a fire extinguisher in your jeep

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Old 09-15-2010, 11:14 AM   #3
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