Ford 2010 F-150 Owner's Manual page 318

Roadside Emergencies
To reinstall the fuse box cover, place the top part of the cover on the
fuse panel, then push the bottom part of the cover until you hear it click
shut. Gently pull on the cover to make sure it is seated properly.
The fuses are coded as follows.
Fuse/Relay
Location
1
2
3
4
5
6
7
8
318
2010 F-150 (f12)
Owners Guide, 1st Printing
USA (fus)
Fuse Amp Protected Circuits
Rating
30A Moon roof
15A Not used (spare)
15A Not used (spare)
30A Not used (spare)
10A Keypad illumination, Brake Shift
Interlock (BSI), SJB microprocessor
power
20A Turn signals, Stop lamps
10A Low beam headlamps (left)
10A Low beam headlamps (right)