Exciter Wire with Early Regulator Setup

Electrical and Ignition

  1. seabee

    seabee FABO Gold Member FABO Gold Member

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    Hello Folks I hope all is well.

    I am installing a new wiring harness from Rebel Wire and I am having a hard time wrapping my head around the use of the exciter wire. The exciter wire goes straight to the fuse block. From what I can understand is that it simply relays voltage back to the alternator to correct for voltage drop? I have the 3 wire alternator. Before, I just grounded one of the field posts to ground and it worked fine. But now that I am completely replacing all the wiring I am wondering if the use of an exciter wire and possibly a later era regulator would have any benefits.

    What are your thoughts?

    Details:
    1966 Barracuda 273
    Early Style Regulator
    3-Pin Alternator-50Amps
    Possibly moving to LED headlights and Electric Cooling Fan later on.

    Thanks

    ETA: I found the answer here Mopar Charging Systems. I guess the exciter wire is just for the alts with the 3 wires and internal regulator.
     
    Last edited: Apr 27, 2021
  2. 67Dart273

    67Dart273 FABO Gold Member FABO Gold Member

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    What do you mean "3 wire?" I would call the 69/ earlier setup a "2 wire" If you actually have a later alternator with 2 field terminals (isolated field, 70/ later) I would use the 70 / later regulator.

    If the white is switched with igntion switch I would wire it to the regulator IGN terminal

    Does this "Rebel" have a link to online destructions?

    Simplified diagram of 70/ later

    Dual_Field_Alternator_Wiring.jpg

    Pre-70--original alternator grounded field cannot be insulated

    pic1.png
     
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    • seabee

      seabee FABO Gold Member FABO Gold Member

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      Thanks Del. Yes, I have the post 70' 2-field alternator. Sorry for the confusion.[​IMG]
       
    • 67Dart273

      67Dart273 FABO Gold Member FABO Gold Member

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      OK. Check as much as you can that the white is swiched in the "run" position, and connect it both to one field and to the VR IGN terminal. Run the second field (does not matter which is which) back to the remaining regualtor terminal. Make SURE the VR is grounded
       
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