Hi my name is John.
What make,model,year, and engine do you have?
Does it blow when you turn on the key or when you try to turn over the engine?
When it blowing the fuse try pulling out the fuel pump relay and see if it stop blowing the fuse.You can buy a circuit breaker to install in there instead of a fuse till you fix the car.
If it doesn't blow the fuse when you have the fuel pump relay out you will need a fuel pump.
let me know
If the fuse doesn't blow when you have the fuel pump relay pulled out and it does blow when you have it in.The current draw for the fuel pump is more than the fuse.If it blow out only when you are cranking the engine over than the draw at the startewr is more than the fuse.you could do a resistance test of the wire if you think the wiring is a problem.With an OHM meter it should read .5 ohm or less on the resistance.
Let me know if the fuse blow when youy have the relayout.
Please push the accept button when were done.
Thank you for choosing just answer.