Where are fuel pumps located in 1986 Ford F250 pickup?

One in each gas tank and also a booster in-line pump mounted in the frame about mid-way or so. Just follow the fuel line to get to it. If you are getting no fuel what so ever from a certain tank, then it's probably the fuel pump in the tank that is bad. If you are getting no fuel from either tank, then it may be the booster pump, or also the fuel pump relay is an age old cause of problems on these vehicals. Good luck