Depends on the model.
The injection pump on the side of the engine also acts as the fuel pump on non turbo Scudos.
Turbo engines also have a pump in the fuel tank. Fuel tank removal is requrired to gain access to this pump.
is it diesel or petrol check your fuel lines and change diesel filter and prime the disel hand pump and connections
in the fuel tank
If you bypass the fuel pump the car will not run.
In the Tank.
Yes
electric fuel lift pump inside fuel tank and high pressure diesel pump on engine driven by timing belt
You can press the button under the driver's seat to reset the fuel pump.
Its located inside the petrol tank and part of the fuel pump..
There is a hand pump under the bonnet, black in color Your thumb would fit on it. Keep pressing down till it becomes near solid, then you have primed it.
under the drivers seat
the access to the fuel pump is under the rear seat. fold it towards the front and lift the carpet to see the fuel pump fittings. The fuel sensor aka "sending unit" is located inside the fuel tank along with the motor. it cannot be purchased separately unless you find a fuel pump with the mechanic which has faulty motor but working sending unit. If you go to fiat service station you need to purchase entire fuel pump.
Sounds very much like the low fuel warning light