Two Fuel Pumps?

Some 1980's vintage Fords with fuel injection, had two pumps. A low-pressure in-tank pump supplied a high-pressure pump in the chassis rail.

By your year, a 2000 or 2001 E450, only a high pressure in-tank pump. These pumps do NOT allow fuel to flow through them when they aren't running. In other words, you can't connect an external pump in the middle of the tank-to-engine fuel line and have it draw fuel from a dead pump. If the pump IS bad, tank has to come down, unless there's some clever way to get at the top of the tank from the side or inside the coach.

ok so i did have a cut in my shore power cord, which we have now taken care of so hopefully that will take care of the shocking issue. But as to the whirring, we are not hearing anything. And we are waiting on a friend to come back out and check to see if the power is reaching the fuel pump. My main concern was if there were two fuel pumps and where the second one would be. We have looked and did not see one but just wanted reassurance. I know realistically we are gonna have to lower that darn fuel tank that is full of gas.....plus i am sunk in the mud a bit on that side so we are gonna have some fun! Thanks!

Can't help on the fuel pump,mine is a Chevy.On the getting shocked this thread may be helpful on the subject of a "Hot Skin"

CLICK HERE FOR THAT THREAD

Can you hear a whirrrr for a bit (5-7 seconds) when you turn on the ignition? (Not to start, just to on position)
If not, it is dead.
Most Ford fuel pumps die at 10-15 years. Mine did, and I posted pics with the post when a friend and I swapped the pump one cold January day. I had odd start problems before it quit. Fortunately it was in the barn at home during one of my monthly starts.

Shocking off rig is normally associated with a broken ground wire in shore power cord. If using adapter check it!
Most likely bad fuel pump. Not sure how Fords are wired to provide initial fuel pump operation when in start mode. My GM has a fuel pump relay that runs for a few seconds to charge system, then the fuel pump power runs through the oil pressure sending unit.

Likely an in tank pump only, and if your not getting fuel, likely its toats.