No fuel pump

I have 2002 mustang GT When trying to start I can not hear fuel pump and have no pressure Someone changed wiring harness under hood and I replaced so I believe I have that right I have checked the fuses and they are good. Replaced fuel pump and still nothing I checked that before putting on I checked inertia switch and has 12 volts on both wires when turning engine over What would you advise me to do next
 
Does the check engine light go out during cranking?

1996+ Crank with no start check list