Ford F-250 Owner's Manual page 315

The fuses are coded as follows.
Fuse/Relay Fuse Amp
Location
1
2
3
4
5
6
7
8
9
10
2011 F-250/350/450/550 (f23)
Owners Guide, 3rd Printing
USA (fus)
Roadside Emergencies
1
2
3
4
5
19 30
6
20 31
48
7
21 32
8
9
40
49
10
22 33 41
11
23 34 42
12
24 35 43
13
25 36 44
14
26
37 45
15
27
16
28 38 46
17
29 39 47
18
Protected Circuits
Rating
30A Not used (spare)
15A Upfitter relay #4
30A Not used (spare)
10A Telescoping mirror switch, Interior
lights, Hood lamp
20A Moon roof
5A Driver seat module
7.5A Driver seat switch, Driver lumbar
motor
10A Power mirror switch
10A Upfitter relay #3
10A Run/accessory relay, Customer
access feed
315