[gutts]

Hello All !
I have a problem I cannot figure out . Perhaps I am missing something ? Long story short :
Key on =power to fuel Solenoid (I tested it it is good)
= no power going to tank switch
I have run the truck momentarily with jumpers to the wires that go back to the rear of vehicle. Both pumps work . The truck has undergone a engine transplant. This has been a year long process. Through out the process there seamed to be an intermittent issue with this . With all the fuel wires, switch , solenoid , oil pressure switch , intact , I've got nothing .
I know where the feed wires exit the firewall and go to the tanks .
Where do the wires that go to the fuel switch come from ? I believe they come from the solenoid??
Where to look ? Are there any common problem areas ?