Ef falcon won’t start. Need some advice please. The Fuel relay won’t engage, when I do bridge the relay across I can hear the fuel pump running. So all fuses seem okay I have power at the fuel relay but the green brown wire which probably comes from the ECU won’t engage it,also there is no spark could this be a smart lock problem?

Sounds like it as the smart lock disables crank fuel and spark

charge and test battery -
does interior light work -
is smartlock light flashing before turning key on and going out when key turned to reds -
check fuses with a test light -
do you have power at coil and injectors -
SCAN FOR FAULT CODES -
possible faulty crank sensor,also possible for harmonic balancer to have spun on its mount effecting sensor or timing -
possible faulty efi relay -
possible faulty ignition switch -
no spark can stop fuel working also -
try leaving ignition on reds for 30 minutes -