'86 3G Alternator Install Questions

Yesterday the bearing in my alternator went bad so I decided to upgrade it with a 3G 130Amp alternator.

I've read through several walk-thru's, including this one: http://www.stangnet.com/mustang-forums/646825-3g-alternator-install-how.html

The problem I'm running into is that the '86 is a Btard year.

I ran a 4g lead from the post to the starter 'noid, ground down the bracket, ect. Now it's an electrical problem. I'm missing wires.

2011-03-15_14-18-23_862.jpg

2011-03-15_14-18-39_262.jpg


As you can see I don't have the stator wire coming from the D connector.

I was wondering if I could use the green/red wire that's on the middle of the plug as the stator wire because of this pic:
3Gpigtail.JPG

Photo by Katmandu

and this pic:
52292d1192414108-3g-alternator-install-how-3g-rear-view-75-.gif

Photo by [email protected]

Or if there is a how-to for '86s I'd really appreciate it.
 
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I think I may have figured it out on my own.

I think this has also cleared up an idle problem I was having. Before the idle would fluctuate from 1k to 2k while at lights & things. Now it stays between 800-1000rpm.

From what I figured out on my car the yellow is a constant & the green/red is a key on/ignition on. There doesn't seem to be stator wire.

On the '94 the yellow is constant, middle white/black is stator, & outside green/red is key on/ign on.

So I did the following:
I needed a wire to run to the non-existent 3rd prong. So I made one.
2011-03-15_16-05-32_187.jpg


2011-03-15_16-05-38_387.jpg


I missed a bit of a step pic wise- but what I did was cut the green/red wire. I soldered the green/red coming off of the wiring harness to the piece of wire I ran through the D plug. Then I soldered a piece of wire onto the green/red wire that was left on the D plug.

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All connected:
2011-03-15_16-27-33_473.jpg


I still need to get 2 more ring connectors so I can move the fuse a little further down the line but it's working for now:
2011-03-15_16-39-27_108.jpg


Too keep it from hitting something & shorting out until I can clean it up:
2011-03-15_16-42-03_864.jpg
 
I still think you're missing a resistor in there. The PA Performance conversion plug includes a resistor on the red/green wire, and you can see it in the diagram that jrichker posted above. I do not know what the consequences of omitting this resistor are, but I do know that I sleep better at night when I know my car isn't going to catch on fire from an electrical problem because I cut corners. :p

If you haven't seen it already, I made a post about it in the 3G conversion thread:

http://www.stangnet.com/mustang-forums/646825-3g-alternator-install-how-4.html#post8336469
 
Just wanted to update. I bought the harness from PA performance. To be honest- I don't think it was worth the $25 it cost me. I should have just looked up what resistor I needed & spent the .25 to buy one.

Not that the harness is bad at all- just not worth $25 when all I really needed was a resistor.
 
Just wanted to update. I bought the harness from PA performance. To be honest- I don't think it was worth the $25 it cost me. I should have just looked up what resistor I needed & spent the .25 to buy one.

Not that the harness is bad at all- just not worth $25 when all I really needed was a resistor.

Post a picture or send me a link that shows the PA Performance wiring harness and I will update my 3G tech note to include the 86 model Mustang.