It should be on the passenger side next to the radiator.
The gas tank on the 2003 Ford Expedition holds 28 gal..
The electric fuel pump is INSIDE the fuel tank on a 2003 Ford Expedition
On a 2003 Ford Expedition : 106 liters ( 28 U.S. gallons )
In a 2003 Ford Windstar the engine coolant reservoir is in the engine compartment ( on the passenger side , it's the reservoir in the middle )
The electric fuel pump is inside the fuel tank
I believe it is on top of the plastic coolant recovery tank - thread on cap
gas tank
In a 2003 Ford Expedition : ( the gas tank size is 28.0 U.S. gallons )
28 gallons
fuel pump is inside gas tank
106 liters ( 28.0 U.S. gallons )
The electric fuel pump is inside the fuel tank