Question about 1988 Ford F 150

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No power at fuel pump or crash switch

1988 ford f150 truck there is no power at fuel pump or crash switch,i also changed the fuel pump relay with a new one. it has duel tanks.

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OK, you may have a dedicated pump for each tank, if so; DOES THE OTHER TANK WORK? If so, you have a problem with the switching system or second tank pump. You may have been testing the electrical, but remember: even a pump that works does not pump gas of there is a broken rubber feeder hose inside the tank. I would consider dropping the tank taht does not work and checking the pump and filter inside. Make sure key is on and test (usually the gray wire). Good luck.

Posted on Sep 10, 2009

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Did you check the fuse? there are some under the dash and under the hood

Posted on Sep 10, 2009

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1 Answer

92 f150 50 it has duel tanks front tank pump isn't working And the rear pump works but the!a tank has a bad leak. The front tank is plastic. Can I switch pumps and does each pump have its own relay.


a fuel pump is a fuel pump and a relay is a relay
relays only a high current direct to the pump without going through a current sensitive switch
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The fuel pump relay and the oil pressure switch as well. The oil pressure switch runs power to the fuel pump when you first start it
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I know the ford cars had a trip relay for the fuel pump. In the event of a wreck it shuts the fuel pump down and has to be reset manually. I am unsure if the pickups had the same thing.

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