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
Batterysection of theMaintenance and Specificationschapter.
The high-current fuses are coded as follows:
Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
1 Relay Blower motor/Variable blower
control (Dual Zone Climate
Control)
2 Relay Electronic Shift-on-the-Fly
(ESOF) Lo-Hi
3 Relay Heater mirror
4 — Not used
5 30A* Trailer Brake Controller (TBC)
2009 F-250/350/450/550(f23)
Owners Guide, 1st Printing
USA(fus)
Roadside Emergencies
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Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
53 Relay PCM power bus (Fuses 68, 70,
72, 74, 76) (Diesel engine only)
54 Relay Starter solenoid
55 Relay Trailer tow park lamps
56 Relay Trailer tow battery charge
57 Relay Power Distribution Box (PDB)
bus (fuses 67, 69, 71, 73, 75, 77)
SJB Run /Start bus (Fuses 29–37,
46)
58 Relay ESOF hi-lo
59 Relay PCM power bus (Fuses 68, 70,
72, 74, 76) (Gasoline engines
only)
60 Diode One touch start (OTIS)
61 Diode A/C clutch
62 Diode Fuel pump
63 15A** Trailer tow back-up lamps
64 5A** Mirror marker lamps
65 — Not used
66 — Not used
67 — Not used
68 — Not used
69 — Not used
70 10A**Gasoline engines:A/C clutch
relay coil, Refrigerant
Containment Switch, Heated PCV
Diesel engine:A/C clutch relay
coil, Clutch switch, Fuel pump
cooler, A/C cycle pressure switch
71 5A** Fuel pump relay diode,
PCM/ECM Run/Start power
72 15A**Gasoline engines:Ignition coils
Diesel engine:Engine TCM
73 2A** Reverse Camera System (RCS)
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Owners Guide, 1st Printing
USA(fus)
Roadside Emergencies
324
Power distribution box
(see Fuses) ...............................321
Power door locks ......................153
Power mirrors ...........................111
Power point ...............................107
Power steering ..........................280
fluid, checking and adding ....394
fluid, refill capacity ................404
Power Windows .........................108
Preparing to drive your
vehicle ........................................281
R
Radio ................................26, 28, 35
Rear seat entertainment
system ..........................................51
Relays ........................................316
Remote entry system ...............157
illuminated entry ............162–163
locking/unlocking
doors ................................153, 158
replacing the batteries ...........160
Reverse camera .........................292
Reverse sensing system ...........289
Roadside assistance ..................313
S
Safety belts (see Safety
restraints) ..........................178–183
Safety defects, reporting ..355–356
Safety restraints ................178–183
Belt-Minder...........................186
extension assembly ................189
for adults .........................179–183
for children .............................200lap belt ....................................184
warning light and
chime ...............................185–186
Safety restraints - LATCH
anchors ......................................212
Safety seats for children ..........204
Safety Compliance
Certification Label ....................409
Satellite Radio Information ........47
Seats ..........................................169
child safety seats ....................204
cleaning ...................................364
heated ........................................84
memory seat ...................159, 174
SecuriCode keyless entry
system ........................................163
SecuriLock passive anti-theft
system ................................165, 167
Servicing your vehicle ..............367
Setting the clock
AM/FM/CD .................................30
AM/FM/In-dash 6 CD ................37
Snowplowing ...............10, 310–311
Spark plugs,
specifications .....................403, 408
Special notice ..............................11
ambulance conversions ............10
diesel-powered vehicles ...........10
four-wheel drive vehicles .......312
utility-type vehicles ..................10
Speed control ............................116
Starting your vehicle ........272–274
jump starting ..........................342
Steering wheel
controls ....................................118
tilting .......................................104
SYNC..........................................79
2009 F-250/350/450/550(f23)
Owners Guide, 1st Printing
USA(fus)
Index
417
