Question about 1986 Ford F 250

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Fuel tank i have a 1986 f250. when i switch to the front tank the sending unit works but it still pumps from the rear tank. both tanks have new fuel pumps and sending units installed.

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  • trkrmoo29 Nov 07, 2008

    no i haven't replaced the switch in the cab. i wasn't sure if that was the problem because it show the sending unit working in the front tank when i switch to it.

  • trkrmoo29 Nov 07, 2008

    thank you, i give it a try!!!

  • yadayada
    yadayada May 11, 2010

    Have you replaced the switch?

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  • 60,769 Answers

Check it with an ohm meter or a test light to see if it sends power to the rear tank and front tank like it should, it is easy to get to.

Posted on Nov 07, 2008

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1 Answer

How to replace sending unit


It could be the tank selector switch mine when bad and neither tank would work. The switch gets burned up inside. If that's not it could be the fuel pump both tanks have a fuel pump in them. I would try the switch first it's only $14 the fuel pumps $130

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1 Answer

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