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Question About Troubleshooting Gauges

Discussion in 'Intermediate CJ-5/6/7/8' started by Mazinger, Apr 20, 2017.

  1. Mazinger

    Mazinger New Member

    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
     
    Mazinger, Apr 20, 2017
    #1
  2. Focker

    Focker That's a terrible idea...What time? Staff Member

    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
    Focker, Apr 20, 2017
    #2
  3. Focker

    Focker That's a terrible idea...What time? Staff Member

    Focker, Apr 20, 2017
    #3
    1974Sixer likes this.
  4. Mazinger

    Mazinger New Member

    Mazinger, Apr 20, 2017
    #4
  5. 1974Sixer

    1974Sixer Member

    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?
     
    1974Sixer, Apr 20, 2017
    #5
  6. zila

    zila I throw poop

    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.
     
    zila, Apr 20, 2017
    #6
    1974Sixer likes this.
  7. Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

    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.
     
    Walt Couch, Apr 23, 2017
    #7
    1974Sixer likes this.
  8. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    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
    Howard Eisenhauer, Apr 23, 2017
    #8
    1974Sixer likes this.
  9. timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    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.
     
    timgr, Apr 23, 2017
    #9
    1974Sixer likes this.
  10. Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

    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.
     
    Walt Couch, Apr 23, 2017
    #10