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Fuel Guage Wiring

Discussion in 'Trucks [ Eighteen Wheelers ]' started by kwforage, Oct 4, 2009.

  1. Oct 4, 2009 #1
    kwforage

    kwforage Road Train Member

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    Jun 3, 2007
    Wisconsin
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    I had a u joint come apart awhile back, the driveshaft then proceeded to take out a few airlines and wires. I have since fixed everthing except one of the wires. It is for the fuel guage. I am wondering how are fuel guages typically wired? I now have two wires, wire #1 has one end connected to the sending unit and the other end cut off, wire #2 has one end to a ground and the other end cut off. I have searched for where these wires should go but have no idea. I would guess one must go to a power source. Any ideas?
     
    Last edited: Oct 4, 2009
    kwforage, Oct 4, 2009
    kwforage, Oct 4, 2009
    #1
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  3. Oct 4, 2009 #2
    dicky

    dicky Bobtail Member

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    Aug 16, 2008
    st.paul , mn.
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    one wire goes to the post on the sending unit , the other goes to oneof the screws holding the sending unit into the tank or virtually to a ground
     
    dicky, Oct 4, 2009
    dicky, Oct 4, 2009
    #2
  4. Oct 4, 2009 #3
    112racing

    112racing Road Train Member

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    pocono's, pa
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    has to go to the tank as the tank is not grounded because of the rubber under the straps
     
    112racing, Oct 4, 2009
    112racing, Oct 4, 2009
    #3
  5. Oct 4, 2009 #4
    kwforage

    kwforage Road Train Member

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    Jun 3, 2007
    Wisconsin
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    Maybe I should just start from scratch here. Let's see, one wire from the tank to the frame for a ground. One wire from the sending unit to the gauge. Where is the power source going? To the gauge?
     
    kwforage, Oct 4, 2009
    kwforage, Oct 4, 2009
    #4
  7. Oct 5, 2009 #5
    CUMMINS downunder

    CUMMINS downunder Bobtail Member

    7
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    Sep 22, 2009
    New Zealand
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    Could be wrong here but power comes from guage to sender unit and moves guage dependant of resistance through sender unit then earths to ground.
    Any help?
     
    CUMMINS downunder, Oct 5, 2009
    CUMMINS downunder, Oct 5, 2009
    #5
  8. Oct 5, 2009 #6
    dicky

    dicky Bobtail Member

    31
    8
    Aug 16, 2008
    st.paul , mn.
    0
    Ground out each wire to see which one makes the gauge work in the dash, when you find that one hook it to the post on the sending unit. Hook the other wire to one of the screws holding the sending unit in the tank.... done!!
     
    dicky, Oct 5, 2009
    dicky, Oct 5, 2009
    #6
  9. Oct 5, 2009 #7
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    Jun 14, 2009
    romulus,mi
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    Dicky is right on the money.
     
    QUALITYTRUCK, Oct 5, 2009
    QUALITYTRUCK, Oct 5, 2009
    #7
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