FORD 2012 F-550 v.3 - Manual (Page 324)

The fuses are coded as follows.
Fuse/Relay
Location
Fuse Amp
Rating
Protected Circuits
1 30A Not used (spare)
2 15A Upfitter relay #4
3 30A Not used (spare)
4 10A Interior lights, Hood lamp
5 20A Moon roof
6 5A Driver seat module
7 7.5A Driver seat switch, Driver lumbar
motor
8 10A Power mirror switch
9 10A Upfitter relay #3
10 10A Run/accessory relay, Customer
access feed
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22 33 41
42
43
44
45
34
35
36
37
23
24
25
26
27
28 38 46
39 47 29
32
40
31
30
48
49
Roadside Emergencies
324
2012 F-250/350/450/550 (f23)
Owners Guide, 3rd Printing
USA (fus)