There are going to be two relays the ECM relay is what sends power to the coils in the pump relay. When you first turn the key on can you hear the relays latch in (click)?
Also you need to do a voltage check at the relays if you have voltage coming out of the relays check for it at the inertia switch then at the tank selector switch then at the pumps to see where you are loosing it at. Or you can start at the pumps and work you way back to the pump fuse checking for voltage.
Just remember you should only have power to the pumps for a couple of seconds when the key is first turned on. But you can put a jumper wire to ground on the data test plug to put constant power to the pumps to do the voltage checks