Power distribution box, Roadside emergencies – FORD 2012 F-550 v.2 User Manual
Page 325
Power distribution box
The power distribution box is located in the engine compartment. The
power distribution box contains high-current fuses that protect your
vehicle’s main electrical systems from overloads.
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
Roadside Emergencies
325
2012 F-250/350/450/550 (f23)
Owners Guide, 2nd Printing
USA (fus)