dynoh2o
Registered User
I have an 83 F250 6.9L that will not switch tanks. It is stuck on the front and will not register on the gauge either. I was messing withe the switch and blew the aux fuel circuit fuse, no big deal. I have driven the truck since then and it still runs, on the front tank I am assuming. I really need a more detailed wiring diagram of the fuel system because I can't see from the ones I have how the heck the front tank fuel pump can be running with the selector circuit un-powered. Any help is appreciated.