Fuel pump problem

I drove my vehicle home from work, had over a quarter tank of gas, parked it, went to leave the next day and it wouldn't start. Looked at the gas gauge and it say empty. No leaks, no one stole my gas. So I put five gallons of gas in it and the gauge never moved. So I thought the fuel pump was bad, I replaced the fuel pump assembly, hooked everything back up, put gas in it, turned the key on and off to build up pressure and still the same problem, gauge says empty, won't start. Fuses are good, tried jumping the relay and can't hear the pump kick on. Used a test light, I have power going to the fuel pump but it won't work. I'm clueless. I'm no certified mechanic, but I'm very mechanically inclined. I need help.