Where is location of Fuel Pump Cut-off Relay ?

[adobe]

My 85 F-250 big block dual tank not getting fuel to carb (not fuel injected). I need to know exactly where the fuel pump relay is located. Thank you for your help and advice!

 

[Fellro]

If I remember correctly, it should be by the master cylinder booster on the firewall. There is one there for lights to a trailer. An additional would be for the fuel pump. Later models had the computer plug there and the EFI relays as well. Had one actually get water in it sitting and then froze, expanding the connection and causing a no start...