Question about 1986 Ford F 350

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When replaced the fuel send unit the fuel gage sits on empty

I replaced the fuel send unit in my f 350 with the 6.9L 1986 and the fuel gage will not work. replaced it with a ford part and still can not get it to read I am getting 6 volts to the back were the tank is and there is still notthing on the gage anyone have ideas

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  • richardw620 Mar 01, 2009

    yes we tryed that and it went way past full and would never come down from there.

  • richardw620 Mar 02, 2009

    even if the sending unit came from the ford dealership and was ordered in. could it be in the wiring harness under the drivers door it was broke when i got the truck?

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  • Master
  • 4,669 Answers

Try grounding the gauge wire at the tank. If the gauge and wiring are good the gauge will go way past full when you do this.

Posted on Mar 01, 2009

  • Clint Smock
    Clint Smock Mar 01, 2009

    But it came back down after you unhooked the ground wire right? If so get another sending unit, yours is bad.

  • Clint Smock
    Clint Smock Mar 02, 2009

    Not if you grounded the wire at the tank. but also check the ground wires on the tank sender if they aren't good you will get the same problem.

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tnx 4 using fixya,

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