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alternator wiring question

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by lasvegas, Dec 23, 2001.

  1. lasvegas

    lasvegas 1/2 ton status

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    I have a '78 blazer. There are three wires that go to my (stock) alternator. Two are in a plug in harness and the third is a large single wire that attaches on the back of the alternator. What is this single wire? And does anyone know if it is needed with the wranglerNW dual battery set up (which I am putting in today). Thanks
     
  2. Michael

    Michael 1/2 ton status

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    That's the one that charges the battery.....

    Michael[​IMG]
    <a target="_blank" href=http://www.jmartin.net/parker/goose.htm>www.jmartin.net/parker/goose.htm</a>
     
  3. Highlander

    Highlander 1/2 ton status

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    All that I can tell you for sure is yes youqill need that one wire it's your 12volt sorce or Maybe I should say the battery wire. Now I have a ? for you are you putting the relay in all so? if so what size did you get? you see I would like to put in a duel battery set up in my 83 I have a 140 amp alt and a 200amp relay from Wrangler but I need the wierimg diagram for the three way switch are you going to do all that or just the basic set up with an Isolator?

    Eric

    <a target="_blank" href=http://cethern.tripod.com/erics-home-page-and-other-stuff/>http://cethern.tripod.com/erics-home-page-and-other-stuff/</a>
    AMSOIL Dealer # 529948
    Cethern@interfold.com
     
  4. lasvegas

    lasvegas 1/2 ton status

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    Just so I am clear, the wrangler kit comes with a BIG cable that goes from the atlernator to the battery which is to charge the batteries. So that wire is supplying current to the truck, right? It is not charging the battery, right?

    I got the relay from wrangler and a three way switch. My switch came with a harness and all the little parts to make it plug into my fuse block. The little harness is well labeled and although I have no clue about wiring, the instructions and labels made it a five minute job to hook up. It took longer to drill the hole in the firewall than it took to wire the whole thing up. I know that one wire hooks to the pos coil terminal, one to the neg coil terminal, and one to the main batt term. There is a ground from the neg coil terminal to the body. Then inside the truck, you hook up the power to a RUN only power source. If you have the harness and need the wiring instructions, I have a two page wrangler sheet which I can fax to you tommorrow? Also, because I had so many questions, they walked me through the whole thing on the phone and I wrote down all the connections that were not included in the instructions. I can fax those to you too. Let me know.

    <P ID="edit"><FONT class="small">Edited by lasvegas on 12/23/01 04:58 PM.</FONT></P>
     
  5. Highlander

    Highlander 1/2 ton status

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    It would be neat if I had a fax. But it sounds just like what I need I think I could make up a harness if I had something to work off of. I think it would be great to beable to use one or both battery's hell even to jump start yourself without haveing to open the hood would be cool. So if you think of a way that I could see your info let me know.
    Thank's Eric

    <a target="_blank" href=http://cethern.tripod.com/erics-home-page-and-other-stuff/>http://cethern.tripod.com/erics-home-page-and-other-stuff/</a>
    AMSOIL Dealer # 529948
    Cethern@interfold.com
     

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