i wanna test out my main relay/fuel pump.

ive tried two different main relays and the pump isnt turning on, so i got the rear seat out, and theres four wires going into the tank/pump area.

they are yellow/black, yellow/white, black/ silver and black that is attached to ground.

i want to just add twelve volts from the batter to it to see if the pump turns on. so if anyone can tell me which wires are what, that would be great. thanks