Fuel pump

Hi, My 2005 fuel pump died, I replaced it with a fuel pump from an earlier version with an adapter sleeve. This required modifying the wire connection to the pump (black to black and Red to Yellow) the unit was then reassembled and reinstalled. Cranked the engine but would not start. 
Pump could be heard running for a few seconds and whilst cranking. I clipped fuel inlet and return lines, no fuel flowing. 
I had removed the old fuel and replace either 12 litres of fresh petrol. 
Any ideas? Thanks NigelB

Try applying a direct + voltage to the pump and seeing if it runs so you can eliminate it being a wiring or relay fault

Do not make any test connections to a fuel pump if there is petrol vapour about. This is a valid test but make up a test cable specifically for this job & with a wire long enough to be away from fumes.
DO NOT CONNECT A COUPLE OF BARE WIRES ADJACENT TO WHERE PETROL VAPOURS COULD BE PRESENT, your car runs on petrol vapour & it is a tiny spark that makes the whole lot work, just think what a big fat spark could do with twelve litres of petrol in the vicinity.
M

Airportable wrote: Do not make any test connections to a fuel pump if there is petrol vapour about. This is a valid test but make up a test cable specifically for this job & with a wire long enough to be away from fumes.
DO NOT CONNECT A COUPLE OF BARE WIRES ADJACENT TO WHERE PETROL VAPOURS COULD BE PRESENT, your car runs on petrol vapour & it is a tiny spark that makes the whole lot work, just think what a big fat spark could do with twelve litres of petrol in the vicinity.
M

As someone who's skillset includes "Shotfirer" (the modern politically correct term for Power Monkey) otherwise known as having a licence to blow shit up with explosives.......I can tell you it's always best to be a good distance away from the shit that goes bang when fiddle arseing about with sources of detonation....ie: naked flames, sparks etc.

Any pressure from the fuel filter?

If it's definitely running (mine died recently - on the MOT testers car lift!) I tested mine with a meter - power available when Igmition switched on, and then when cranking, as you've found.
Try reversing the connections, it's always possible that the pump wiring isn't correct. If that doesn't work, then I would think it's a bad pump.

Good safety advice there. Setup any lead first before applying power.