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Good day sir, Check the connections where the fuse fits into for bad connection due to corrosion. Check to see if the switch is not faulty by measuring the contacts with a meter when opening and closing. Check the wires that connects to the switch, check the pump relay (which may also be faulty) to see if there is a bad connection due to gunge (Corrosion always sets in at electrical connections) or if the wires that connect to the relay base are firmly connected not loose. (Remember rule of thumb law_always check for corrosion and loose connections with any electrical fittings, as a lot of people have replaced new parts on their vehicles in vain only to be left with the same problem and wasting money. I have found this to be a major problem with the electrics in most motor vehicles throughout my years of experience. (Most repair shops will not tell you this as they would rather bill you for replacing a new part than help you without making money out of you) Although there might be some honest one's around, but few and far between.
under the hood in the black main relay and fuse box.look for fuel pump relay.the relays most likely bad. or a loose wire to the fuel pump.has it been wrecked? have to ask yourself alot of questions when you bypass the pump straight to battery and it works. start with simplelest 1st. check main fuse relay and fuse panel 1st.then go to wiring harness that goes to the pump. thank you for choosing fixya.com.
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.
First thing I would do is change your fuel filter. Check all vacuum lines and all your wire connections. Also check fuel pump relay to see if it is faulty or if there is shorted wires under the relay or fuse blocks.
check the fuse .if the fuel pump was bad you blew the fuse . there is a inertia switch in the trunk or under the dash you could check . push the red button to reset relay should be under the hood in the fuse box check your book if you have one.