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check fuel pump reley under hood volts at yellew wire turn key check wires next to it ,pull reley check conduity on small pins ! ! [ - - ] , if good put a jumper wire on yellew wire and brown-yellew see if it runs if you have a bad pump if its not running also check the eec power reley

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Q: How do you know if your fuelpump is bad on a 1990 ford f150?
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