Ford F-350 Owner's Manual page 300

Roadside Emergencies
The fuses are coded as follows.
Fuse/Relay Fuse Amp
Location
1
2
3
4
5
6
7
8
9
10
300
2008 F-250/350/450/550 (f23)
Owners Guide (post-2002-fmt)
USA (fus)
Passenger Compartment Fuse
Rating Panel Description
30A Not used (spare)
15A Not used (spare)
15A Family Entertainment System (FES)
30A Not used (spare)
10A Keypad illumination, Brake-Shift
Interlock (BSI), SPBJB
20A Turn signals
10A Left headlamp (Low beam)
10A Right headlamp (Low beam)
15A Interior lighting, Lighted running
boards
15A Cargo lamp