FORD 2012 F-550 v.1 - Manual (Page 330)

WARNING: Always disconnect the battery before servicing high
current fuses.
WARNING: To reduce risk of electrical shock, always replace
the cover to the power distribution box before reconnecting the
battery or refilling fluid reservoirs.
If the battery has been disconnected and reconnected, refer to the
Battery section of the Maintenance and Specifications chapter.
The high-current fuses are coded as follows:
Fuse/Relay
Location
Fuse Amp
Rating
Protected Circuits
1 Relay Blower motor
2 — Not used
3 Relay Urea heaters (diesel engine)
4 — Not used
5 Relay Rear window defroster
6 — Not used
7 50A* Rear window defroster
8 30A* Passenger seat
9 30A* Driver seat
10 — Not used
11 — Not used
12 30A* Driver smart window
13 — Not used
Roadside Emergencies
330
2012 F-250/350/450/550 (f23)
Owners Guide, 1st Printing
USA (fus)