My fuel pump won't come on

How did you check the relay?

Does your vehicle have a security system on it ? If it does maybe something wrong with it telling vehicle is being stolen and it will shut power off to the fuel pump.

I just took em out and put the old relays from my old box in the new one but I took it to a Ford place and they said the computer is not communicating with the diagnostic machine to even run the test so idk what's going on

Yes it does have a security system on my car but I just took the fuse pout of it to turn it off but it still wouldn't crank I'm trying to go a cheap route before I just take it back to Ford

take out the whole security system it's under the driver side dash ... disconnect all wires from security alarm and connect stock wires as they should be and it will start ... I did this to a crown fix police 2008 model and it started up like new

If the computer won't connect it is possible that the cigar lighter / OBD port fuse is blown.

In the trunk of the car on drivers side, there is a box with a red button on the top. Push the button down until it clicks in place and see if that’s the problem. If it’s already down and not moving then that’s not the problem. That box in the trunk is the emergency fuel cut off switch Incase the car was in an accident but it sometimes will pop up for other reasons too.

I am not get gas to fuel rail want cause that

Angeib what year is your crown victoria?