Shelby Leigh Jones

Hey everyone! Need help with my 92 ls 400. Bout a month ago it quit running on me. I hit a small bump it started pausing up real bad while i had my foot on the gas the finally shut off while I was driving down the road... Well we don't hear the fuel pump starting up and we have removed the fuel filter from under the car and no gas is spraying out when the key it on.... I notice while installing my sound system that there was a silver disk behind the back seat covering a gold thing with two wires running into it. Is that the fuel pump? If not where is it located or any other ideas as to what could be wrong with the car? Hopefully it could just be something cheap and simple Thanks!!!