oil temp & water temp peg out

Discussion in 'Peterbilt Forum' started by boogiecanam, Sep 15, 2011.

  1. Sep 15, 2011 #1
    boogiecanam

    boogiecanam Bobtail Member

    1
    0
    Sep 15, 2011
    covington,ga
    0
    when i turn my lights on the oil & water temperature guages peg out all the way to the top. i replaced the accessory relay to no avail. when i pull the dash & lift the wires it will stop. seems like a ground short but i can'
    t find it. any ideas????
     
    boogiecanam, Sep 15, 2011
    boogiecanam, Sep 15, 2011
    #1
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  3. Sep 15, 2011 #2
    dave26027

    dave26027 Road Train Member

    1,284
    804
    Sep 10, 2009
    Dallas, Texas
    0
    Two wires have rubbed together until the sheathing wore away and they're touching. Or a wire has rubbed on something that is grounding it out. Common problem, hard (or impossible) to find.
     
    dave26027, Sep 15, 2011
    dave26027, Sep 15, 2011
    #2
  4. Sep 16, 2011 #3
    Sparkz

    Sparkz Light Load Member

    76
    16
    Jul 10, 2011
    New Zealand
    0
    Could be that the gauges are not properly grounded.
    When the lights are off the gauges earth through their bulbs. When the lights are on they can't earth out and so the pointer goes full scale.

    Do the lights glow correctly in these gauges?
     
    Sparkz, Sep 16, 2011
    Sparkz, Sep 16, 2011
    #3
  5. Sep 16, 2011 #4
    mark2842

    mark2842 Light Load Member

    104
    15
    Nov 10, 2007
    Lawrenceville,Ga
    0
    Welcome aboard old friend.
     
    mark2842, Sep 16, 2011
    mark2842, Sep 16, 2011
    #4
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