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Thread: Alternator Wiring Help

  1. #1
    Senior Member
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    Alternator Wiring Help

    I am trying to modify the wiring harness to work for my 3 wire alternator. I believe I can hook up the brown wire to the number one post, the smaller red wire to the number two post, and then the two big red wires to the battery post.

    Can someone tell me if that is right?
    Ryan
    33 Hot Rod
    350 SBC with TKO 500, 3 link rear

  2. #2
    Senior Member Big Blocker's Avatar
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    A picture of the back of your alternator would help out, can't remember ever seeing any "numbers" on the back terminals, just Bat, Sta and Fld.

    That being said; the brown wire should go to Sta, the red wire to Fld and the BIG red wires to BAT - if my aging brain cell remembers correctly.

    To verify, you might want to do a google search for alternator hookups . . .

    Doc
    FFR3712K (MKII) in Lost Wages Nevada.
    5.0 w/tubular GT-40 EFI, E303 cam, Custom 4 into 4 headers, T5, 3-Link 3.73 rear. Full F5 tubular suspension. Drop Butt mod, Dash forward mod, custom foot box air vents, custom turn signal system. 13" PBR brakes, Fiero E-Brake mod, Flaming River 18:1 rack w/ F5 bump steer kit on Breeze bushings. 17" Chrome Cobra "R's" w/ 275 fronts and 315 rears. MKIV seats. FORD Royal Blue w/ Arctic White stripes.

  3. #3
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    I can’t seem to post the photo. It’s a GM 10si alternator. The number 1 post has an “r” and the number 2 post has an “f” and then theres a “batt” post.

  4. #4
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    Alternator.jpg

    Here is the photo of the back of my alternator.
    Ryan
    33 Hot Rod
    350 SBC with TKO 500, 3 link rear

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