There should be a diagram in the Ford Owners manual for the chassis fuse locations and amperage of the fuses. I saw one one time on the web, so you should be able to locate one there if you do not have the owners manual. I believe that the F53 fuse panels are the same as a F550, but not positive. JMO
Jack
2003 Rexhall Vision 27'
2019 Chevrolet Equinox
States we have been to with this MH