Iveco Daily 35S12 Fuel pump problems (electrical)?

hey all,

i own a 35s12 hpi on an "x reg" it was running lovley then it basically kist stopped.there was no fuel coming to the injectors,i tired to bipass the fuel tank by going straight from a drum of diesel still no joy.ive narrowed it down to an electical fault with the pump(unless any other suggestions).what i need help with is how to test the pump and what the 3 wires are and the best way of testing these with out frying the ECU

many thanks