Keeps blowing ignition fuse under steering wheel

1990 MAZDA B2600
244,000 MILES • 4 CYL • 2WD • MANUAL
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KRISTIE RODEN
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I tuned it up put new fuel pump .we can drive it cut it off then it acts won't crank I find blower 15 amp fuse I put a 20 amp in it tried to start then blew the fuse again I un plugged fuel pump and it didn't blow fuse again can you head me in the rite direction thanks j
Sep 4, 2015 at 12:15 PM
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RIVERMIKERAT
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It sounds like you got a defective fuel pump. Use a multimeter to see if it's shorted. One lead to ground the other lead to the hot input side of the pump. You should read either an open or a high resistance.
Sep 4, 2015 at 12:43 PM