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Re: fuel pump fuse
Check the wiring harness for a live>ground fault
maybe the live to the pump(s) rubbed hard against the chassis somewhere.disconnect the harness from the pumps along the chassis rail somewhere and put a fuse in again. keep following the harness back and disconnecting til the fuse sts good. U may need 3-4 fuses. at some point you sould locate the section where the live is grounding. be patient it may take a while to locate. be optimistic - it may only take a minute!
:) good luck, hope this helps
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disconnect the fuel pump and place a new fuse in the holder if it still blows go back to the relay and disconnect it and fit a new fuse. In the first instance if the fuse stays good the replace the fuel pump as you have a dead short in it.. If it blows at the relay replace the relay as the short will be there.
This normally happens due to short in the wirings.Or if someone has connected a stereo or some other electrical contrivance to the wiring harness (bundle), either under the dash or under the hood.To confirm this unplug the fuel pump wiring connections and insert new fuse.Then start the car and see,if still the fuse blows then its a short in wiring.But if the fuse does not blows then its faulty fuel pump relay or faulty fuel pump itself.So first replace the fuel pump relay and see,if the fuel still blows then its faulty fuel pump.But if the fuse not blowing then relay was the faulty part.The fuel pump relay located on the fuse box under the hood.---------This troubleshooting tips will help you locate the fault and solve it.-------Thanks.Helpmech.
If it is blowing the fuel pump fuse, then when replacing the fuel pump one of the wires are pinched. Check the wiring. Even if the fuel pump is bound up or something then it still would not blow the fuse. More than likely the hot wire to the pump is pinched and grounding out.
the fuel pump and radio are not on the same circuit, most liokely the fuel pump is shorted, that is the most common cause, get under the truck and disconnect the fuel pump connector at the tank, if the fuse doesn't blow then u need a new pump.
Usually if a fuse blows when applying something else( brakes) indicates they are on the same circuit. Verify the brake lights don't work when the fuse is out or blown. If lights still are working then it's probably not related. If on same circuit then the extra load of the brakes is enough to blow the fuse. Insure you are putting in the correct fuse. Also, this indicates you fuel pump is in a strain either due to restricted fuel filter or worn pump. Replaceing the fuel filter now will only buy you a little time before the pump goes on out. It's blowing fuses because it's drawing more amps in order to run, but always replace filter when replacing pump.
replace the fuel pump, it is drawing to much current, this is common when the pump bearings get worn out, also make sure you replace the fuel pump connector at the fuel tank connection, it will be burnt..