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Thread: 3g install **go directly to post 50 for drawing

  1. #1
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    Default 3g install **go directly to post 50 for drawing

    ***************EDIT 29sep07- go directly to post #50 and 49 for final draft. Everything prior to post 49 is fyi only.
    Last edited by jcassity; 05-14-2013 at 03:49 PM.

  2. #2
    84 Fila Guest

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    For asking sake, I'd do one of a 83-86, then all the T/c's, then 87-88 cars. Should cover all the bases

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    generally speaking, i dont see why there would be much of a difference ,, i never took a close look at the tc charge but id recon they are duplicates.

    what was your issue?

  4. #4
    84 Fila Guest

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    Mine, I forgot to hook up a wire and it's still not charging. That and my battery light is still on.

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    The difference is that older cars originally had an external regulator. Still an easy install, though - you just disconnect the external regulator entirely, run the green/red stripe to the 3G's regulator plug as shown in your diagram, and wire the rest as shown.

    That diagram looks familiar, BTW - almost looks like one I made up a while ago:


    2015 Mustang GT Premium - 5.0, 6-speed, Guard Green - too much awesome for one car

    1988 5.0 Thunderbird SOLD SEPT 11 2010: TC front clip/hood ♣ Body & paint completed Oct 2007 ♣ 3.55 TC rear end and front brakes ♣ TC interior ♣ CHE rear control arms (adjustable lowers) ♣ 2001 Bullitt springs ♣ Energy suspension poly busings ♣ Kenne Brown subframe connectors ♣ CWE engine mounts ♣ Thundercat sequential turn signals ♣ Explorer overhead console (temp/compass display) ♣ 2.25" off-road dual exhaust ♣ T-5 transmission swap completed Jan 2009 ♣

  6. #6
    84 Fila Guest

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    Carm, on the Black with orange, is it from the battery to the alt, or from the black and orange wire already in the car to the battery. Thats where I got lost at. I just don't wana hook it to the wrong place

  7. #7
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    The black wire with orange stripe is already in the car. I dunno about external regulator alternators, but the 2G found in 86-88's has that black wire in a plug on the alt instead of bolted to a stud. There are actually two black/orange wires in that plug, but they are spliced together a few inches back in the harness. Ford decided it would be better to split the current between two terminals instead of one to prevent overheating and possibly a fire. Didn't work. Even with two terminals they're prone to fire.

    If you use a large enough wire (6 gauge or better) from the output stud of the alternator to the battery you don't really need to connect that black/orange wire at all (which is why I put "optional" in the diagram). I did it anyway - it's there, and it doesn't take a lot of effort to put a ring terminal on it...

    I don't have a pic of the setup in my current car, but here it is in my old '87 Sport (the alternator isn't fully bolted in in the pic - the top bolt is out and the alt is rotated out to where the air cleaner would be to make showing the wiring easier).

    You can see the original black/orange wire attached to the stud (approaching it from the bottom) as well as the 6-gauge wire (approaching the stud from the top, with loom on it). You can also see the aluminum filings from where I had to grind a bit off the bracket to fit the physically larger 3G into the bracket.

    Note that in this pic I don't have the yellow regulator wire looped directly to the output lug on the alternator, as in the wiring diagram above. That's because, IIRC, I made that diagram up for a 1G (external regulator) to 3G swap. When you've got the 2G alt you can leave the yellow wire as it is and only loop the white/black wire to the "S" terminal on the alternator body
    2015 Mustang GT Premium - 5.0, 6-speed, Guard Green - too much awesome for one car

    1988 5.0 Thunderbird SOLD SEPT 11 2010: TC front clip/hood ♣ Body & paint completed Oct 2007 ♣ 3.55 TC rear end and front brakes ♣ TC interior ♣ CHE rear control arms (adjustable lowers) ♣ 2001 Bullitt springs ♣ Energy suspension poly busings ♣ Kenne Brown subframe connectors ♣ CWE engine mounts ♣ Thundercat sequential turn signals ♣ Explorer overhead console (temp/compass display) ♣ 2.25" off-road dual exhaust ♣ T-5 transmission swap completed Jan 2009 ♣

  8. #8
    84 Fila Guest

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    So just this then, for my 84 atleast...
    I dont have a small yellow wire, but a orande and blue one. and insted of the big red wire you have on there, I used the yellow/white wire from the tarus on there.

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    Looks good to me
    2015 Mustang GT Premium - 5.0, 6-speed, Guard Green - too much awesome for one car

    1988 5.0 Thunderbird SOLD SEPT 11 2010: TC front clip/hood ♣ Body & paint completed Oct 2007 ♣ 3.55 TC rear end and front brakes ♣ TC interior ♣ CHE rear control arms (adjustable lowers) ♣ 2001 Bullitt springs ♣ Energy suspension poly busings ♣ Kenne Brown subframe connectors ♣ CWE engine mounts ♣ Thundercat sequential turn signals ♣ Explorer overhead console (temp/compass display) ♣ 2.25" off-road dual exhaust ♣ T-5 transmission swap completed Jan 2009 ♣

  10. #10
    84 Fila Guest

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    Aight, have it perminatly mounted tomorow after I scrounge up a coil

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