Do you hear the pump running for the initial 5 seconds?
No? I think the orange wire is the hot to the pump, not sure.
One of those wires should have 12 volts on it for the first 5 seconds after the key is turned to start, then it goes away. Test one at a time. If yes, voltage is there for the 5s, replace pump.
if you can hear it running for the 5s, then look for a restriction somewhere - crushed line etc.