1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

Fuel Gauge To Work

Discussion in 'Early CJ5 and CJ6 Tech' started by houstons4, Aug 10, 2014.

  1. Aug 10, 2014
    houstons4

    houstons4 New Member

    Ohio
    Joined:
    May 27, 2014
    Messages:
    30
    Just looking for some clairity

    Working on getting the proper ground for a fuel gauge. I understand the gauge needs grounded but also am I to understand that the fuel tank sending units body is also to have a separate ground? Just looking for some confirmation that both need grounded?
     
    houstons4, Aug 10, 2014
    #1
  2. Aug 10, 2014
    MrPolecat

    MrPolecat New Member

    Brandywine, WV
    Joined:
    Dec 5, 2013
    Messages:
    28
    From my poking around, I am thinking they still used 6v gauges in these vehicles or something like that. I think there's some kind of voltage regulator setup on there that the shunts the extra power to the extra ground to avoid burning out the gauge with 12v. It looks to me like if that ground was bad, the gauge would get a full 12v and probably fry. Strange design decision!!!

    But yeah, I don't really know what I am doing, so I may well not know what I am talking about!
     
    MrPolecat, Aug 10, 2014
    #2
  3. Aug 11, 2014
    peter

    peter Member

    Roseville, CA.
    Joined:
    Aug 26, 2008
    Messages:
    161
    I just put in a new sending unit on my 67 225 v6. It had a seperate ground wire that i attached to the tub behind the seat. The one it replaced was probably original and had no ground wire. I think it was grounded through the tank matal strap. Which is likely why many of them don't work very well. The new one does work. I hope that helps.
    Peter
     
    peter, Aug 11, 2014
    #3
  4. Aug 11, 2014
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
    Messages:
    8,128
    Yes indeed there needs to be a good connection to the body from the tank. This was normally through the fuel line however a seperate jumper from the sender unit to a nice clean paint/rust free spot on the tub never hurts. On Tonk I've got the tank sitting on plastic spacers, the hold down is isolated from the tank by a rubber strip, a rubber gasket isolates the fill pipe from the tub and the fuel line has insulating sleeves & a rubber section and I'm *still* showing a good ground to the tub :rofl:


    H.
     
    Howard Eisenhauer, Aug 11, 2014
    #4
  5. Aug 11, 2014
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
    Joined:
    Nov 27, 2006
    Messages:
    2,793
    That voltage regulator design on the gauges is used in lots of vehicles. My '78 Goldwing had one in it.
     
    1960willyscj5, Aug 11, 2014
    #5
New Posts