Problem with fuel pump/relay.

Hi! I have a 2001 1.6 megane Cabriolet. I have recently lost power whilst driving and the car seemed to run out of fuel (as I did a lot with my old car) I have noticed that the fuel pump does not prime when the ignition is turned on. I have a voltage at the fuel pump within the small wires which I assume is for the petrol gauge etc. no voltage with larger wires. Next step is to check fuse and relay in the engine bay. My problem being I have no idea what relay is for the fuel pump and the manual has no layout diagram. Any help appreciated