Hey to everyone. I have a 90 f250, 5.0, 5 speed, 4x4. It was running fine. I parked in a customers drive way and when I got back in I had no fuel pump. The front tank hasn't been used since I have had the truck because the tank is shot and pump is gone. I put a new pump in the rear tank(the only tank I use). Still nothing. I check the old pump by hooking directly to the battery and it works so my pump wasn't bad after all.
I check power at the eec and fp relays power coming in and out
I have power in and out at the inertia switch and its not tripped. I have never owned a dual tank truck before so my question is would a bad dash tank switch cause no power to the fuel pump.
Sorry for the long post and any help will be greatly appreciated. Thanks