I have this issue, when you turn the ignition on and go to start the truck, i don't have power to the pump off the main wire, checked all wires and no breaks, fuse is good, start run relay is good, I jumped the pump fuse and it works. Story is we took a wrecked truck and one that was water submerged and made one, took all modules from one and complete harness and interior to install, truck ran before they removed engine.