2020 FORD F450 SUPER DUTY fuse box

FUSE SPECIFICATION CHART
Engine Compartment Fuse Box
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. The engine compartment fuse box is in the
engine compartment. It has high-current
fuses that protect your vehicle's main
electrical systems from overloads.
If you disconnect and reconnect the
battery, you need to reset some features.
See Changing the 12V Battery (page 373).
Replace fuses with the same type and
rating. See Changing a Fuse (page 340).
334
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 201909, Second-Printing FusesE306306

3. Raise the hood until the lift cylinders
hold it open.
4. To close, lower the hood and make sure that it is closed properly and fully
latched.
UNDER HOOD OVERVIEW - 6.2L Air filter. See Changing the Engine Air Filter (page 351).
A.
Engine compartment fuse box. See
Fuse Specification Chart (page 334).
B.
Brake fluid reservoir. See
Brake Fluid Check (page 371).
C.
Windshield washer fluid reservoir. See
Washer Fluid Check (page 376).
D.
Engine coolant reservoir. See
Engine Coolant Check (page 358).
E.
343
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C
FE314770

Power steering fluid reservoir. See Power Steering Fluid Check (page 372).
F.
Engine oil fill cap. See
Engine Oil Check (page 346).
G.
Engine oil dipstick. See
Engine Oil Dipstick (page 346).
H.
Battery. See
Changing the 12V Battery (page 373).
I.
UNDER HOOD OVERVIEW - 6.7L DIESEL Battery.
See Changing the 12V Battery (page 373).
A
Engine compartment fuse box.
See Fuse Specification Chart (page 334).
B
Engine oil dipstick.
See Engine Oil Dipstick (page 346).
C
Secondary fuel filter. See
Changing the Engine-Mounted and Diesel Fuel
Conditioner Module Fuel Filters (page 380).
D.
Engine oil filler cap. See
Engine Oil Check (page 347).
E
Engine cooling system coolant reservoir - primary high-temperature cooling
system. See
Engine Coolant Check (page 358).
F
Brake fluid reservoir.
See Brake Fluid Check (page 371).
G
Battery.
See Changing the 12V Battery (page 373).
H
344
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Windshield washer fluid reservoir. See Washer Fluid Check (page 376).
I
Power steering fluid reservoir. See
Power Steering Fluid Check (page 372).
J
Secondary cooling system coolant reservoir. See Engine Coolant Check
(page
358).
K
Air filter assembly. See
Changing the Engine Air Filter (page 354).
L
Air filter restriction gauge. See
Changing the Engine Air Filter (page 354).
M
UNDER HOOD OVERVIEW - 7.3L Windshield washer fluid reservoir. See
Washer Fluid Check (page 376).
A.
Engine coolant reservoir.
See Engine Coolant Check (page 365).
B.
Brake fluid reservoir.
See Brake Fluid Check (page 371).
C.
Engine compartment fuse box. See
Fuses (page 334).
D.
Power steering fluid reservoir. See
Power Steering Fluid Check (page 372).
E.
Engine oil dipstick.
See Engine Oil Dipstick (page 346).
F.
Engine oil filler cap.
See Engine Oil Check (page 348).
G.
Air cleaner assembly. See
Changing the Engine Air Filter (page 354).
H.
345
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AUXILIARY SWITCHES
For maximum vehicle performance, keep
the following information in mind when
adding accessories or equipment to your
vehicle:
•
When adding accessories, equipment,
passengers and luggage to your
vehicle, do not exceed the total weight
capacity of the vehicle or of the front
or rear axle (GVWR or GAWR as
indicated on the Safety Compliance
Certification label). Ask an authorized
dealer for specific weight information.
• The Federal Communications
Commission (FCC) and Canadian
Radio Telecommunications
Commission (CRTC) regulate the use
of mobile communications systems
equipped with radio transmitters, for
example, two-way radios, telephones
and theft alarms. Any such equipment
installed in your vehicle should comply
with Federal Communications
Commission (FCC) and Canadian
Radio Telecommunications
Commission (CRTC) regulations, and
should be installed by an authorized
dealer.
• An authorized dealer needs to install
mobile communications systems.
Improper installation may harm the
operation of your vehicle, particularly
if the manufacturer did not design the
mobile communication system
specifically for automotive use.
• If you or an authorized Ford dealer add
any non-Ford electrical or electronic
accessories or components to your
vehicle, you may adversely affect
battery performance and durability. In
addition, you may also adversely affect
the performance of other electrical
systems in the vehicle. The auxiliary switch option package
provides six switches mounted in the
overhead console. These switches operate
when the vehicle is running or from battery
power, depending on the switchable fuse
AUXF4's location in the upfitter relay box.
We recommend, however, that the engine
remain running to maintain battery charge
when using the auxiliary switches for
extended periods of time or higher current
draws.
Note:
When your vehicle has a diesel
engine, use the auxiliary switches only when
the engine is running. The glow plugs also
drain battery power when the ignition key is
in the on position. Using the auxiliary
switches, even for limited amounts of time,
can cause your battery to drain quickly and
prevent your vehicle from restarting.
When switched on, the auxiliary switches
provide electrical battery power for a
variety of personal or commercial uses.
Switches 1 through 4 provide 25 amps.
Switches 5 and 6 provide 40 amps.
The relay box for the auxiliary switches is
in the engine compartment. See your
authorized dealer for service.
The relays are coded as shown:
551
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Launching or Retrieving a Boat or Personal
Watercraft (PWC)....................................... 309
Safety Chains...................................................... 304
Trailer Brakes...................................................... 304
Trailer Lamps...................................................... 308
Trailer Towing Connector............................... 300
When Towing a Trailer..................................... 308
Event Data Recording See: Data Recording............................................. 12
Export Unique Options.................................18
Exterior Mirrors................................................98 Blind Spot Information System..................... 101
Clearance Lamps .............................................. 100
Direction Indicator Mirrors ............................. 100
Fold-Away Exterior Mirrors............................... 98
Heated Exterior Mirrors ................................... 100
Memory Mirrors .................................................. 100
Power Exterior Mirrors........................................ 98
PowerScope ™ Power Telescoping
Mirrors................................................................. 99
Puddle Lamps..................................................... 100
Spot Lamps......................................................... 100
Telescoping Mirrors............................................. 99
Trailer Towing Camera System..................... 100
F
Fastening the Seatbelts
..............................39
Fastening the Cinch Tongue............................ 40
Seatbelt Locking Modes..................................... 41
Using Seatbelts During Pregnancy...............40
Using the Seatbelt with Cinch Tongue (Front Center Seat on Super Cab and
Crew Cab).......................................................... 39
Fire Extinguisher
............................................321
Flat Tire See: Changing a Road Wheel........................ 422
Floor Mats
.......................................................318
Fog Lamps - Front See: Front Fog Lamps......................................... 91
Foot Pedals See: Adjusting the Pedals................................. 86
Ford Credit.........................................................16 US Only..................................................................... 16
Ford Protect...................................................555 Ford Protect Extended Service Plan
(CANADA ONLY).......................................... 556Ford Protect Extended Service Plans (U.S.
Only).................................................................. 555
Four-Wheel Drive
..........................................212
Front Fog Lamps.............................................91 Front Fog Lamp Indicator.................................. 91
Switching the Front Fog Lamps On or Off........................................................................\
.. 91
Fuel and Refueling
.......................................184
Fuel Consumption........................................193
Advertised Capacity.......................................... 193
Fuel Economy...................................................... 193
Fuel Filter - 6.2L
............................................376
Fuel Quality - Diesel.....................................187 Biodiesel................................................................ 188
Diesel Fuel Additives ........................................ 189
Fuel Requirements - Choosing The Right Fuel: Vehicles Operated Where Ultra Low
Sulfur Diesel Fuel Is Not Required ..........187
Fuel Requirements - Choosing The Right Fuel: Vehicles Operated Where Ultra Low
Sulfur Diesel Fuel Is Required (United
States/Canada/Puerto Rico/U.S. Virgin
Islands And Other Locales) ...................... 187
Fuel Quality - E85........................................185 Choosing the Right Fuel - Flex Fuel
Vehicles............................................................. 185
Switching Between E85 and Gasoline............................................................ 186
Fuel Quality - Gasoline..............................186 Choosing the Right Fuel.................................. 186
Fuel Shutoff
....................................................321
Fuses................................................................334
Fuse Specification Chart..........................334 Engine Compartment Fuse Box................... 334
Passenger Compartment Fuse Panel................................................................. 338
G
Garage Door Opener...................................163
Garage Door Opener See: Universal Garage Door Opener ............163
Gauges
.............................................................104
DEF Gauge............................................................ 106
Engine Coolant Temperature Gauge..........106
Engine Oil Pressure Gauge............................. 106
Fuel Gauge............................................................ 106
621
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 201909, Second-Printing Index