megane no power to the fuel pump and no spark

i have a megane 1999 1.6 petrol.

there is no power to the fuel pump, it has fuel in it and i have tried the reset button in the engine bay. it all lights up as it should and turns over.

it has 2 cables powering the fuel pump one black and one white. which is the positive?

i have bridged the fuel pump relay under the bonet and the fuel pump works but constantly .

is there anyway to reset the fuel system? otherwise can i bypass it, powering the pump direct?

the imobiliser works cause...

megane no power to the fuel pump and no spark