The computer doesn't know the voltage at the pump it may through a code if the fuse blows but I don't know for sure.Thanks, makes sense. I'd be interested in hearing if anyone tried - I might give it a shot tonight just to see. The OEM wire looks about the same gauge as the one my relay kit came with. The ECU should throw a P0231 code if the voltage drop is too much, right? FWIW, he 2015 also uses a 20a fuse for the fuel pump
If the 6.7 pump uses the same amperage fuse then the factory wiring should work but it may not be ideal.