We were a Fleetwood dealer. I believe the running light fuse and base wiring were supplied by ford. Fleetwood connected to the ford wiring at the chassis. I am pretty sure the fuse is in the ford fuse block on the firewall in front of the driver.
1998 Pace Arrow 35 ft. F53 Ford V10 2012 Honda Civic toad
32 years mechanic at Delta Air Lines 15 year motorhome service manager. 3 popups....2 travel trailers....5 motorhomes....loved them all.