Fuel pump with LS engine

[Ramiro0727]

So my boy swapped his heads out and he was putting the headers back on the fire it up again and when he was connecting the battery again he accidentally arched the battery and now the fuel pump won’t prime or even turn on unless we put power directly to the fuel pump itself. We checked the power to all the fuses and they have power we’re just not getting power to the back part of the truck now. What else can I do to try to troubleshoot the problem.

Thanks ,
Ramiro