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Electrical Question (from An Electrician)

Discussion in 'Builds and Fabricators Forum' started by Lilbuff63, Mar 7, 2024.

  1. Mar 7, 2024
    Lilbuff63

    Lilbuff63 Member 2022 Sponsor

    Sonoma County Ca
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    Jan 12, 2014
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    Last weekend I drove the Jeep to help Liam work on his Toyota, gotta get it ready to haul taco night grub and extra beer on the Rubicon! When I went to start the Jeep when I was leaving, it started and the ignition started smoking, turned it off and messed with the wires a bit and same thing. Noticed that the Start wire was the only hot terminal on the back of the ignition so I disconnected it and no more smoke. So I tapped the start wire on the ignition and started it and I was able to drive home. Now I disconnected the start wire and it is clear of any shorts to the starter. When I check continuity from the start terminal on the starter to the starter case it has continuity, so does that mean the solenoid is bad?
     
    Norcal69 likes this.
  2. Mar 7, 2024
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
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    Quick guess, as I picture your description, I think the small "start" terminal activates the solenoid when powered from the key switch - therefore it must have continuity to ground, through the solenoid coil. The starter "case" obviously is also grounded. So, no?

    But the "start" terminal on the switch should only be energized if you are twisting the key.

    Therefore, ispso facto dipsy doodle, the key switch is bad?
     
  3. Mar 7, 2024
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
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    So either there's a short to ground there someplace or the switch contacts got resistive.

    If a short then:

    Could be in the switch.

    Could be in the wire to the solenoid.

    Could be the solenoid.​

    My bet would be the switch as you seem to indicate the switch got hot but not the wire.

    If it's a cruddy switch contact then it's time for a new switch anyhow.
     
  4. Mar 7, 2024
    Lilbuff63

    Lilbuff63 Member 2022 Sponsor

    Sonoma County Ca
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    Jan 12, 2014
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    Thank you both! I ordered a switch from Kaiser Willys earlier this week because, well, smoke and all. I just wasn’t sure about the starter and how that should be with continuity. Wire is clear to the starter!
     
    timsresort likes this.
  5. Mar 7, 2024
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
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    Ahhh... I thought you meant 'hot' as in electrically energized, stuck "on." If it was heat-hot, Howard is more likely correct - that the switch was shorted or resistive.
     
    dozerjim likes this.
  6. Mar 7, 2024
    timsresort

    timsresort Active Member 2023 Sponsor 2022 Sponsor

    South Lake Tahoe CA
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    I agree, the switch, or at least take it out of the equation, maybe by hot wiring, and see if it's clear. And very cool Liam is hauling the grub. We will all have incentive to keep that thing upright.
     
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  7. Mar 7, 2024
    Lilbuff63

    Lilbuff63 Member 2022 Sponsor

    Sonoma County Ca
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    He is hell bent on having it ready, putting a lot of time and money into it to make it happen! A lot better than other things he could be doing as a teen! We’ll have to give him a break for not being in a CJ
     
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  8. Mar 7, 2024
    Norcal69

    Norcal69 Out of the box thinker 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Northern California
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    Sounds like a bad key switch to me.
    Cheap enough to find out.
     
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  9. Mar 7, 2024
    Lilbuff63

    Lilbuff63 Member 2022 Sponsor

    Sonoma County Ca
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    New one should be here tomorrow!
     
    Norcal69 and dozerjim like this.
  10. Mar 8, 2024
    OldAdobe

    OldAdobe Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    N. CA
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    Things got hot? Might check for a short while you have the switch out and then again after installing the switch.
     
  11. Mar 8, 2024
    Lilbuff63

    Lilbuff63 Member 2022 Sponsor

    Sonoma County Ca
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    Jan 12, 2014
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    New ignition switch is installed and all is good! Downside is I had to get rid of the ignition I’ve been starting this Jeep with since I was, I don’t know, 6 years old? Plus side is I have a spare
    Briggs and Stratton key now.
    :beer:
     
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