Frustrating fuel gauge, always shows empty.

Discussion in 'Sparky's corner' started by GSCat-UK, May 17, 2020.

  1. GSCat-UK

    GSCat-UK Active Member

    Hi Guys I'm ripping my hair out over my fuel gauge constantly reading empty.
    I installed a new sender but the problem remains. I have followed the troubleshooting guide kindly done by a member on here and still cannot for the life of me figure it out.
    I checked the sender with a tester and it's showing around 50 ohms.
    I pulled the tan wire feeding the sender and the gauge reads full, I then grounded the wire and the gauge goes to empty, I have a good earth from the sender to the body but the problem remains.
    Could the culprit be a break in the tan gauge to sender wire?
     
  2. woody1640

    woody1640 Well-Known Member

    A member of our 61-63 group had a similar problem with his gauge. He found a loose wire connection (barely loose) on the back of the gas gauge.

    Have you checked your wires on the gauge behind the dash?


    Keith
     
  3. TrunkMonkey

    TrunkMonkey Totally bananas

    Sounds like the tan wired front to back maybe pinched and grounding if the gauge drives to full when you disconnect the sender wire at the tank. (If I read your post correctly).

    It runs from the gauge to the intermediate (under carpet/floor harness), and then at the back there are is a rubber grommet and a "bullet" connector. That tan wire has several places it can get pinched or chaff and ground.

    The gauge (has resistor on the back) gets power and the sender acts as a potentiometer and "turns the volume up or down". If the tan wire breaks, the gauge will drive to Full as its "normal state" (no resistance at the gauge), and if the tan wire (or sender) grounds, it will drive the gauge to Empty from voltage providing resistance at the gauge.
     
    bostoncat68 likes this.

Share This Page