The 1997 Ford Expedition's fuel pump is located
inside the fuel tank. There isn't an external inspection plate specifically for the fuel pump. To access the fuel pump, you have to
drop the fuel tank. This is not a job for the casual home mechanic; it requires specialized tools and safety precautions due to the flammable nature of gasoline.
You cannot change the fuel pump through any kind of access plate. The entire tank assembly needs to be lowered.