Ford 2009 F-250 Owner's Manual page 319

The fuses are coded as follows.
Fuse/Relay
Location
1
2
3
4
5
6
7
8
9
2009 F-250/350/450/550 (f23)
Owners Guide, 2nd Printing
USA (fus)
Roadside Emergencies
Fuse Amp
Rating
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
Protected Circuits
319