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Rig Won't Shut Down. This Is A First For Me.

Discussion in 'Early CJ5 and CJ6 Tech' started by Bigdaddy13, May 10, 2021.

  1. Bigdaddy13

    Bigdaddy13 Member

  2. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    That's dead-on book voltage for charging.
     
    Bigdaddy13 likes this.
  3. Jw60

    Jw60 That guy 2024 Sponsor 2023 Sponsor 2022 Sponsor

    What is the white wire on the coil?
    Tach? Remove it and check for power without starting the engine.
    Then pull all your fuses and check for power at coil without starting.
     
  4. Bigdaddy13

    Bigdaddy13 Member

    Ok, so i’m not getting 12v at the coil in the off position any more. Could there have been a charge from the condenser that has now bled off?
     
  5. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    No, condensors don't hold that much capacity.

    So no voltage at the coil with the wires connected back up, or with the wires disconnected? If disconnected check for voltage at the ends of the wires.
     
    Bigdaddy13 likes this.
  6. Glenn

    Glenn Kinda grumpy old man Staff Member

    With the engine idling does the generator still charge?
     
  7. Bigdaddy13

    Bigdaddy13 Member

    condenser info, got it.

    No voltage at the coil with the wires disconnected or connected.

    it does.
     
  8. Glenn

    Glenn Kinda grumpy old man Staff Member

    Usually they don't, wonder if that's possibly a problem?
     
    Bigdaddy13 likes this.
  9. Bigdaddy13

    Bigdaddy13 Member

    OK, so...

    Let's just say for argument's sake that I've been wanting to rewire this rig since i bought it and the camel has been carrying many straws,
    including a no start situation,
    many cobbled together wires,
    old GM harness parts from the steering column I don't even have any more,
    many melted wires from improper mounting near the fenderwell headers, etc.

    and I have:

    A winch
    A 198 V6, but possibly a motor swap in my future
    A desire to add a GM 90-amp alternator
    A desire to add a hidden USB port for Phone charging
    A desire to add a 12v air compressor
    A desire to add a rear USB port for kid/device phone charging
    A desire to not be chasing random shorts
    No desire for originality, but only what is most reliable/easy to troubleshoot
    A budget of less than $500

    What would you recommend? Walck's stock replacement, KaiserWillys? Painless? EZ wire?

    I am NOT going to go wire by wire and replace this wiring harness...lol. This is supposed to be a FUN hobby of mine.

    I am very good at installs. I am very meticulous when I have a plan. Wiring does NOT come naturally and I do NOT intuitively understand electrical engineering.
     
    Jw60 likes this.
  10. boopiejones

    boopiejones I can’t drive 55

    Well I would have recommended the wire by wire approach. That’s what I did and it was extremely easy. I actually ordered a painless and then returned it because it looked quite painful. For my brain it was easier to just deal with one circuit at a time vs a whole clump of wires. So I bought wire in a bunch of different colors, a bluesea 12 fuse block, and some connectors and spent a couple evenings wiring everything up.
     
  11. garage gnome

    garage gnome ECJ5 welder

    I'm thinking its simple like a bad ignition switch. :shrug:
     
    ITLKSEZ and dozerjim like this.
  12. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    id do a walcks, or some hot rod generic one. for a couple hundred bucks it will give you more than what you need, and then you can mount the fuse block somewhere more accessible than up under the dashboard.
    i bought a painless one, but it was right around your 500.00 dollar budget limit. and ive got so many wire spools left over and ziptied up under my dash from when i did my 1970, its insane.
     
    Jw60 likes this.
  13. Jw60

    Jw60 That guy 2024 Sponsor 2023 Sponsor 2022 Sponsor

    The efi harness I bought was well worth it in materials alone. But call and talk to a person for your mods and they might up the primary and do all the thinking for you. That's how I got the extra idle controls wired in.


    X2
     
  14. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    If you're not electrically inclined the Walcks is probably best, i.e. most expensive. No screwing around with cutting wires, installing connectors, getting involved in long acrimonious threads about connectors, getting involved in long acrimonious threads about installing connectors yaddayadda.

    Plus you get all new light sockets which is something that is a real bonus. :)

    But tell them when you order it that you're going to the big alternator.
     
    Bigdaddy13 and Glenn like this.
  15. Glenn

    Glenn Kinda grumpy old man Staff Member

    I agree with going the Walck's route. Get it totally installed and working properly first, and then go for the little add on stuff. Straight forward basic wiring is quite simple, installing a wiring harness will help you to learn a lot.
     
  16. Glenn

    Glenn Kinda grumpy old man Staff Member

    As far as the alternator are you planning on a one wire?
     
    Bigdaddy13 likes this.
  17. timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    You have an engine swap, a GM column, and an alternator? I'd question whether the Walck's harness would accommodate all these changes. Something for Walck's to answer. In your case, I would suggest repairing what you have, or use one of the many "universal" hot rod harnesses. As built, the Jeep had no fuse panel as such, and any of the hot rod harnesses would give you that. In either case, you're going to have to do some brain work to get to a finished state where everything works.

    I'm not put off by the existing wiring, even if it's all messed up. Some human got it to its current messed up state, and a human can return it to a state of proper order. Have some confidence in your ability to learn and figure things out. Car wiring is really simple in concept and execution, and only seems complicated because there are a lot of circuits side-by-side. Take the circuits one at a time. You don't have to hold the whole thing in your head at once.

    The hot rod harness will give you a lot of new wire, and this can be a real advantage. I think they don't provide you with a wiring diagram as such, and the wiring diagram is an important asset for any future maintenance and repair. Instead, if they provide any instructions at all, they give you something like a recipe or list of instructions. You'd need to re-use all the terminations, and it may be worthwhile to eliminate the original plugs and sockets. You could either simply leave them out and wire direct, or replace with a universal connector like a Weatherpack.
     
  18. timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Test each wire separately, disconnected from the coil. Testing them together does not tell you anything about them separately.
     
  19. if there was somewhere that could make you a custom harness for the amount of money you have available, that'd be cool, but i think it may be out of reach. i'd still give it a try, you may get lucky.
     
  20. Bigdaddy13

    Bigdaddy13 Member

    Yessir, i did that. I tested the white wire at the coil and traced it back to the key. No 12v

    i tested and traced the red wire back to a small post on the starter. again no 12v
     
    Last edited: May 11, 2021