No power to fuel pump

don2rivers

Here is brief history. Would run good but when warm would not restart until it sat for a while. I realized it was the fuel relay. Replaced it and main relay, fuel filter and fuel pump. It ran great for 10,000 miles. One night driving along and it was as if the key was shut off, the engine stopped and I coasted it to a stop. Replaced both relays again nothing. Recheck for power to fuel pump, none, checked fuses OK still no voltage to pump. Spray starter fluid in intake and it runs momentarily. Please help why is there still no power to fuel pump?