512TR Fuel guage reads empty | FerrariChat

512TR Fuel guage reads empty

Discussion in 'Boxers/TR/M' started by Capt. Rich, Mar 8, 2014.

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  1. Capt. Rich

    Capt. Rich Formula Junior

    Jun 9, 2008
    253
    Palm City, Fl.
    Full Name:
    Richard Baumgart
    #1 Capt. Rich, Mar 8, 2014
    Fuel gauge is pegged at empty. The 7.5 amp fuse was blown(instruments). I replaced it and still nothing. I get a reading of 13.5 volts from the ground and + terminal and 5.7 volts from the + and violet wire on the back of the gauge. I assume the violet wire comes from the tank sending unit. Does this mean the analog gauge has taken a crap?
     
  2. janrbh17

    janrbh17 Rookie

    May 6, 2012
    26
    Norway
    Full Name:
    Jan R B Hansen
    #2 janrbh17, Apr 19, 2014
    Hi. I have had intermittent working fuel gauge. Had the sender unit in the tank replaced. Didn`t work. Replaced the fuel gauge itself. Didn`t work. Fuse is ok.
    So I don`t have the solution, but wanted to post this under your thread....
     
  3. Melvok

    Melvok F1 World Champ
    Owner Silver Subscribed

    Jul 25, 2008
    14,112
    Amersfoort, The Netherlands, Europe.
    Full Name:
    Mel
    #3 Melvok, Apr 19, 2014
    Please let our Electric Gremlins speak ............... :)
     
  4. turbo-joe

    turbo-joe F1 Veteran

    Apr 6, 2008
    8,929
    southwest germany and thailand
    Full Name:
    romano schwabel
    #4 turbo-joe, Apr 19, 2014
    what about the red less fuel control light? also burning?
     
  5. tf308

    tf308 Formula 3

    Dec 14, 2003
    1,168
    Virginia Beach
    Full Name:
    Tim
    #5 tf308, Apr 20, 2014
    Quick read I did says a bad ground causes the gauge to go to zero.

    Have you tried running a test ground wire to see if you get a reading?
     
  6. JohnMH

    JohnMH Formula 3

    Jan 28, 2004
    1,632
    Dubai / Bologna
    #6 JohnMH, Apr 21, 2014
    Hey! Same problem on my 91 TR. Cleaned contacts at the sender. No joy. No red light on either, just reads empty when the tank is clearly not.

    When I turn the key to on, none of the wires at the plug connecting to the level sender have any power.

    Next check is the gauge, I am looking forward to reading the solutions to this post.
     

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