I just looked in my Haynes Manual and it's pretty much useless for wiring diagrams.
But remember, there are two fuse panels. One under dash, one under hood. Possible that the fuse you need to check isn't in the one you looked at. Fuse panel is usually labeled. Do you have the Owner's Manual? If so, check it.
Ford used to be notorious for the wiring harness just quitting. Power seat would simply stop working one day, and the fix was to consult the wiring diagram and run a bypass wire. The auto electric shop would not dig into the harness, just wire around the problem. But I'm remembering that as an 1980's thing and haven't heard about it recently.
