How do you change the fuel pump on a 1986 mercurygrandmarquies?

To change the fuel pump on a 1986 Mercury Grand Marquis, first, disconnect the negative battery terminal and relieve the fuel system pressure by removing the fuel pump fuse and running the engine until it stalls. Next, access the fuel pump by either dropping the fuel tank or removing the rear seat to reach the access panel. Disconnect the fuel lines and electrical connector, then remove the pump assembly and replace it with the new pump, reassembling everything in reverse order. Finally, reconnect the battery, replace the fuse, and check for any leaks.