Question About Troubleshooting Gauges

Discussion in 'Intermediate CJ-5 and CJ-6 Tech' started by Mazinger, Apr 20, 2017 at 12:10 PM.

  1. Apr 20, 2017 at 12:10 PM
    Mazinger

    Mazinger New Member

    United states
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    Hi guys my CJ5 fuel gauge always shows empty and my temperature gauge goes up and down from cold to hot constantly on my main gauge speedometer works great. my question is where should i start looking to troubleshoot this problem or has anyone had this same problem and can point me in the right direction thanks again
     
  2. Apr 20, 2017 at 12:22 PM
    Focker

    Focker Rust Never Sleeps Staff Member Sponsor

    Tri-Cities WA
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    Lots of discussions about this. I'll get you the links.

    What year is your CJ? You should fill out that information in your profile and signature line.

    Edit - I saw your other thread regarding your '73.
     
    Last edited: Apr 20, 2017 at 12:30 PM
  3. Apr 20, 2017 at 12:28 PM
    Focker

    Focker Rust Never Sleeps Staff Member Sponsor

    Tri-Cities WA
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  4. Apr 20, 2017 at 12:37 PM
    Mazinger

    Mazinger New Member

    United states
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  5. Apr 20, 2017 at 2:50 PM
    1974Sixer

    1974Sixer Member

    Eureka, Tx
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    Jan 30, 2009
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    Sorry for the hi jack but if I remove the bolts around the outer edge of my dash along with the steering shaft cover, will I have adequate access to the wiring behind the dash? I assume this is the best way in comparison to trying to get to stuff from the bottom?
     
  6. Apr 20, 2017 at 7:06 PM
    zila

    zila I throw poop

    Rock Springs,...
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    Oct 6, 2003
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    760
    Yes. Also the steering column mount. You can lay it open where you can access the speedo cluster.. The cluster is held on by 4 lil nuts.. My guess for the fuel gauge is the float in the tank has a hole in it. I soldered mine up, but have a plastic float on standby. Please use the links provided above. they are spot on, specially the second on.
     
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  7. Apr 23, 2017 at 10:56 AM
    Walt Couch

    Walt Couch sidehill Cordele, Ga. Sponsor

    cordele, Ga.
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    Caution!!! Caution!!! Caution!!! When you have the dash unbolted from the tub DO NOT TURN THE KEY ON unless you remove the power wire from the fuel gauge. You will make MAGIC SMOKE.
     
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  8. Apr 23, 2017 at 11:44 AM
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member Sponsor

    Tantallon, Nova...
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    I put some 6" bolts in the lower corner holes to support the dash , I could pull it out the 6" & tilt it out at the top as well- makes life a lot easier. :)

    H.

    [​IMG]
     
    Last edited: Apr 23, 2017 at 5:48 PM
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  9. Apr 23, 2017 at 12:26 PM
    timgr

    timgr Jeepin' Nerd Sponsor

    Medford Mass USA
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    Has anyone substituted a voltage regulator IC in place of the CVR in the fuel gauge? I made this modification on my J20 using a 7805 and it much improved the stability of my gauges. It appears it would have the added advantage of not conducting if you lift the chip ground... unlike the Jeep CVR which apparently does not cycle without a ground. This sends constant battery voltage through the gauge to ground through the sender ... apparently.
     
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  10. Apr 23, 2017 at 5:34 PM
    Walt Couch

    Walt Couch sidehill Cordele, Ga. Sponsor

    cordele, Ga.
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    I have the parts to make two of them and will get to em soon. Just rcvd my ESR meter so have some power supplies to work on first.
     

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