Hi well I was driving and my car turned off and it didn't want to turn back on so I checked it out and I found out that the main relay was burned so I changed it then I replaced it.. the car turned on perfectly but ten minutes later the car turned off and it didn't want to turn back on so I realized that it has something to do with the electrical wiring but I don't know about car can you give me an advice should I buy a new fuel pump because maybe the other one is old or just check my wiring from the relay to the pump to see if theirs a short circuit...

If you turn the ignition to the "on" position, like if you wanted to just listen to the radio, listen for a quiet whirring noise from the fuel pump. (The fuel pump is located in the gas tank underneath the back seat behind the driver.) If you are in a quiet place it will be easy to hear this whirring. If there is not a whirring noise your fuel pump is probably shot (you would normally check the main relay first, but you just replaced that). If there is a whirring noise then your problem rests elsewhere.