Do you have power on both sides of the fuel pump fuse with it installed in the fuse block? If the fuse is not the type you can probe, you can pull the fuse and check to see if you have 12V on one side of the socket. I am looking for a wiring diagram for your boat. Do you have one? If you have 12V at the fuse then you the circuit is open somewhere in between. That's why we need a diagram, or you get to trace wires.

Sent from my SM-N950U using Tapatalk