Question about 1990 Ford F250

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Rear, fuel pump failed, so i switched to the front tank. the truck ran rough for a week. then the front fuel pump went out. when I volt test at the plug atop the tanks, with the key in the on position I only get constant power to one wire other three nothing. any sugestions? (I've replaced the relay, and checked the fuel inertia switch.)

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  • josh1111 May 11, 2010

    mabe outta my league, is the tank switch on , to the tank you are testing?

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  • 122 Answers

Sounds like a bad ground or short to the signal wire what you can do is trace the wires from the tank to the bulk head connector to check for brakes in the wire but first do a ohm test on the three wires with the key off there is resistance between the wire you have a short if not check for brake or corroded connections

Posted on Jun 04, 2009

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