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Fuse block/wiring help

Discussion in 'Early CJ5 and CJ6 Tech' started by Buddha44, Dec 28, 2014.

  1. Dec 28, 2014
    Buddha44

    Buddha44 Member

    San Clemente, CA
    Joined:
    May 18, 2014
    Messages:
    59
    My 69 CJ5 "Pandoras Box" too good to be true price has a bit of a wiring situation. The PO took all wire leads under the dash and hooked them to one 30amp "motorcycle" style fuse and left it dangling. In an attempt to at least clean it up and make it a bit more reliable, I purchased a generic fuse block from a local electrical supply that has 6 "blade style" points of connection. I attached the new fuse block under the dash in a close to stock location. I have a larger red lead that comes in and feeds the panel, assuming from battery/alternator. Then, I have a tab for horn, tab for lights, tab for alternator, tab for small mystery brown wire, tab for small mystery red wire.
    Question, if the feeder for the panel is coming from alternator, where does the smaller red that leaves panel labeled alternator go? Doesn't ignition need a fuse? So lost.
    Electrical is my Achilles heal.
    Any help, suggestions, diagrams, resources online, etc., would be greatly appreciated. I would like to keep it as simple as possible.
    The sucky part is having two degenerative discs in my lower back, so tracing wires is a SLOW process.
    Thanks in advance and sorry I am a novice electrician.
     
  2. Dec 28, 2014
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
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    8,118
    A '69 , if it really is (more or less) a '69, wouldn't have had a fuse panel. Most circuits would have been fed from a single 30 amp circuit breaker mounted on the back of the light switch. I'd say the PO (or a PPO) had a bad breaker & instead of putting in a new one replaced it with the fuse.

    This should be the correct wiring diagram for your jeep as it left the factory-

    [​IMG]
    As for the colour coding of the wires that's going to be a bit problematic, your best bet is to try & trace out where they go.

    If you don't have one I strongly suggest buying a copy of the factory service manual. Reprints are available from many sources, here's one-

    https://www.originalreproductionsllc.com/details.html?cat_id=3


    H.
     
    Last edited: Dec 29, 2014
  3. Dec 28, 2014
    Buddha44

    Buddha44 Member

    San Clemente, CA
    Joined:
    May 18, 2014
    Messages:
    59
    Thanks!
    wow, I had NO idea a 69 wouldn't run a fuse block. Do you think me "blocking" my jeep and separating out circuits is a worth while endeavor? Appreciate the link also, I have 3 manuals, Haynes, jeep bible, and one other but been looking for a factory manual.
     
  4. Dec 28, 2014
    uncamonkey

    uncamonkey Member

    Greeley CO
    Joined:
    Jun 2, 2009
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    2,104
    Nice work Howard, we sort of rely on you to provide those circuit diagrams and the electrical explanations.
     
  5. Dec 29, 2014
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
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    8,118
    Lots of people think a fuse panel is a very good idea, especially if you're adding circuits such as extra lights etc. usually it's as part of a replacement wiring harness, if your's has been terminally Bubba'd that may be an easier route to go. Personally I put mine back to stock, but I'm more into a restoration situation.

    H.

    The Haynes manual is useless, throw it away
     
  6. Dec 29, 2014
    duffer

    duffer Rodent Power

    Bozeman, MT
    Joined:
    Sep 17, 2009
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    4,500
    Depends on what one is using the Jeep for and if it is an actual restoration. Personally, I get a little nervous with all that wire connected directly to the battery without any protection what-so-ever and having the higher amp draws on relays isn't a bad idea either. My 68 is still stock but it's now a garage queen of sorts. The B doesn't have one piece of the original wiring or, for that matter, what any of those wires connected too.
     
  7. Dec 29, 2014
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    Aug 10, 2003
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    The Haynes manual can be useful, as a door stop, or to prop up the corner of your bed. Lots of possible uses. :)

    Actually, the Haynes manual may be useful for tuneup specs. But they are known for having lots of errors.

    First year for a fuse panel in a CJ is 1975. Prior to that they had inline fuses, and a circuit breaker (?) for the lights. Works fine, but replacing the wiring with a hot rod harness (Painless, etc.) is very popular. IMO many owners are overwhelmed by PO-modified wiring, and decide to rip it all out and start over. Wiring like this is pretty simple to fix if you take it one wire at a time, and refuse to be overwhelmed.
     
  8. Dec 29, 2014
    duffer

    duffer Rodent Power

    Bozeman, MT
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    The proverbial PO's rat's nest. But if you don't document what you do on your own rewire job, more than likely it will just be the next owner's proverbial PO's rat's nest.

    Even with EFI, wiring is usually pretty straight forward. Like Tim said, one circuit at a time and document wire coding and routing if you ever plan to work on it again.
     
  9. Dec 29, 2014
    Buddha44

    Buddha44 Member

    San Clemente, CA
    Joined:
    May 18, 2014
    Messages:
    59
    Thank you guys immensely. Yes, the chiton and Haynes have a bit to be desired. Amazes me that one of the most capable off road vehicles ever relied on "one" fuse. My 66 Chevy pickup is completely "fuse paneled" from the factory.
    i guess one thing that puzzles me is the battery charging. I understand the battery powers the starter, you turn the key, solenoid opens, let's starter pull from battery and spin motor, etc etc. I get all that, spark, etc. what I have forgotten or don't see is how/where is the path from the alternator to re-charge the battery?​ I understand the "out" post on alternator, but nothing goes back to battery, yet jeep runs fine. Does it return thru ground?
    Sorry for lame question, but I like knowing how things work and want to feel comfortable out on the trails. I was inspecting my grounds from battery to frame/motor/chassis...and WOW. Let's just say I will be doing some wire wheel work, new battery terminals, protection spray, etc.. Amazes me it works. When I built my 66 Chevy pickup I put a lot of love into the grounds and it is one of the happiest motors I've ever had.
    Thanks again guys, appreciate the support and tips, truly an awesome site/community.
    Doug
     
  10. Dec 29, 2014
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    There is a wire that goes from the alternator to the big post on the starter. From there the current goes up the positive battery cable to the battery.
     
  11. Dec 29, 2014
    Harlan

    Harlan Member

    Roseburg, Or.
    Joined:
    Apr 19, 2009
    Messages:
    68
    Check out www.madelectrical.com and then electrical tech drop down lots of good advice and information.
     
  12. Dec 29, 2014
    Buddha44

    Buddha44 Member

    San Clemente, CA
    Joined:
    May 18, 2014
    Messages:
    59
    Thanks Tim! Yes, found it today. The wire comes up from starter and appears to make like a "T" by the alternator. It's all wrapped in the original tape, but looks like it goes to alternator and also back to the little electrical junction box on the firewall. Hope that makes sense.
    Harlan, funny you mentioned that! Reminded me I have his (mad) booklet in my garage from prob 15 years ago.
    Going to go dig it out and take a refresher course. I took this week off work for the holidays, so I changed out the water pump this morning. In doing so, found the bracket that holds the coil loose, and the positive post on top of the coil VERY lose, so the wires connected to the positive post were swinging around but somehow still making contact. Also found one wire same size and length as the other wires connected to positive post on coil but it was not attached to anything. I am assuming that since PO upgraded to the Petronix Ignition that wire is probably not required anymore. I believe it is blue with a yellow stripe. I will trace it back when I get more time.
    thank you all again!!!
     
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