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
 
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Does the check engine light go out during cranking?

1996+ Crank with no start check list