Year one engine harness

Electrical & Ignition

  1. madmopar

    madmopar Well-Known Member

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    Not sure if I received the correct harness from Year one. My 68 Charger originally had a small block and auto and points ignition. Purchased what should be a 68 to 70 b body big block harness with electronic ignition. Question is the 2 plugs I circled, aren't these for the ballast? They will not reach back to the firewall. Its got me thinking I have the wrong harness, plus what are these 2 white plugs for?(second pic) Any input would be appreciated.:thumbsup:

    20210223_174333.jpg 20210223_174340.jpg 20210223_174344.jpg
     
  2. 1 Wild R/T

    1 Wild R/T FBBO Gold Member FBBO Gold Member

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    The two plugs circled are field wires for the alternator... The two white plugs are for a dual ballast...

    Screen Shot 2021-02-23 at 7.16.51 PM.png
     
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    • madmopar

      madmopar Well-Known Member

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      Hmm...lol never seen one of those(dual ballast). Where /how can I source one? Thanks
       
    • 1 Wild R/T

      1 Wild R/T FBBO Gold Member FBBO Gold Member

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      • madmopar

        madmopar Well-Known Member

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        :thumbsup: Thank you Wild!
        Have more questions about the relay too but will save those for another day.
         
      • 1 Wild R/T

        1 Wild R/T FBBO Gold Member FBBO Gold Member

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        Your welcome. happy to help.. Relays are fun.... LOL
         
      • WM23M9

        WM23M9 FBBO Gold Member FBBO Gold Member

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        What "Relay"? If I might axe?
        Are you going all Dakota digital, E.F.I. etc?
         
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        • onlyone

          onlyone Bird of Pray FBBO Gold Member

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          The duel resistor is only for the obsolete 5 pin ECU.
          Replacement ECUs will be 4 pin and use the single ballast resistor.
          However all new replacement ECUs that I have found are "junk".
          Auto parts store ones even have "fake" transistors on them so they will look "correct"
          There is only one that I will use
          No resistor necessary
          http://www.4secondsflat.com/Ig


           
          Last edited: Feb 24, 2021
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          • madmopar

            madmopar Well-Known Member

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            OE I guess. The relay I was referring to is the starter. I know the wiring is slightly different between automatics and 4 speeds.
             
          • madmopar

            madmopar Well-Known Member

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            Did look into that one but it's a bit pricy. And since I might go MSD in the near future didn't want to invest so much. I did get one from Ehrenberg's ebay store which I heard are good units.
             
          • onlyone

            onlyone Bird of Pray FBBO Gold Member

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            [
            Yes, pricey compared to junk.
            And EBooger sells generally good stuff.
            I had an MSD in an E body.
            It stranded me one time.
            Running a stock distributor.
            What do you do when your are far , far from home and and gremlins happen in an aftermarket system?
            After that I ran that car with auxiliary wiring to a orange box for back up.
            But that was over 20 years ago.
            Have things improved?
            IDK
             
          • 64fury74charger

            64fury74charger Well-Known Member

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            Just my opinion and experience and that’s all. I have MSD on both of my cars and so far over 8 years there has not been any problems at all. Starting is easy, engines run better and plugs last longer etc....just my experience and that’s all.
            :thumbsup::popcorn:
             
          • onlyone

            onlyone Bird of Pray FBBO Gold Member

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          • madmopar

            madmopar Well-Known Member

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            Is my ignition wire missing or is this brown one it? I thought they were supposed to be yellow?

            20210301_135458.jpg
             
          • MoparDanMan

            MoparDanMan FBBO Gold Member FBBO Gold Member

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            The white connectors in the 2nd pic look like they are for the ballast resistor that mounts on the firewall. Year One sells the harness made by American Autowire. The instructions say that they use the high energy single wire alternator and their harness does not support the stock alternator gage. I ordered one last week but they are on perpetual backorder.
             
          • Don Frelier

            Don Frelier FBBO Gold Member FBBO Gold Member

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            I think your yellow wire has turned brown.
            Looks to be the right length for the starter relay.
            You can find a schematic and cavity assignment to be sure or just try it see if the relay clicks.
             
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            • madmopar

              madmopar Well-Known Member

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              I could of sworn the package for my harness said m&h or something like that but it's been a few years since it was purchased. Plan on doing a "fleet bypass "(I think that's what it's called) so just need it fire up for now.
               
            • madmopar

              madmopar Well-Known Member

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              That's what I was thinking but wasn't sure. Been so long since I took it apart lol.
               
            • wish4hemi

              wish4hemi Well-Known Member

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            • madmopar

              madmopar Well-Known Member

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              That was a great article! Good info. Thank you. I was able to find and install a a dual ballast anyway and trace the ignition wire and it cranks! My next step is plug wires and hopefully spark
               
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