2021 FORD SUPER DUTY fuses

Getting Assistance Outside the U.S. and
Canada .......................................................335
Ordering Additional Owner's Literature ........................................................................\
337
Reporting Safety Defects (U.S. Only) ........................................................................\
337
Reporting Safety Defects (Canada Only) ........................................................................\
337
Fuses
Fuse Specification Chart .........................
339
Changing a Fuse .........................................
346
Maintenance
General Information ..................................
348
Opening and Closing the Hood .............
348
Under Hood Overview - 6.2L .................
349
Under Hood Overview - 6.7L Diesel .....
350
Under Hood Overview - 7.3L ....................
351
Engine Oil Dipstick - 6.2L .........................
352
Engine Oil Dipstick - 6.7L Diesel ............
352
Engine Oil Dipstick - 7.3L ..........................
352
Engine Oil Check - 6.2L .............................
352
Engine Oil Check - 6.7L Diesel ...............
354
Engine Oil Check - 7.3L .............................
355
Changing the Engine Oil and Oil Filter ........................................................................\
356
Oil Change Indicator Reset .....................
356
Changing the Engine Air Filter - 6.2L ........................................................................\
357
Changing the Engine Air Filter - 6.7L Diesel ..........................................................
358
Changing the Engine Air Filter - 7.3L ....
360
Draining the Fuel Filter Water Trap - 6.7L Diesel ...........................................................
361
Engine Coolant Check - 6.2L .................
364
Engine Coolant Check - 6.7L Diesel .....
368
Engine Coolant Check - 7.3L ....................
371
Automatic Transmission Fluid Check ........................................................................\
376
Transfer Case Fluid Check ........................
377Brake Fluid Check
........................................
377
Power Steering Fluid Check ....................
378
Changing the 12V Battery ........................
379
Adjusting the Headlamps ........................
381
Washer Fluid Check ...................................
382
Fuel Filter - 6.2L/7.3L .................................
382
Checking the Wiper Blades ....................
382
Changing the Wiper Blades ....................
382
Changing a Bulb ..........................................
383
Changing the Engine-Mounted and Diesel Fuel Conditioner Module Fuel
Filters - 6.7L Diesel .................................
386
Spring U-Bolt Check - F-600 ................
389
Vehicle Care
General Information ...................................
391
Cleaning Products .......................................
391
Cleaning the Exterior .................................
392
Waxing ............................................................
393
Cleaning the Engine ...................................
393
Cleaning the Exhaust - 6.7L Diesel ......
394
Cleaning the Windows and Wiper Blades ........................................................................\
394
Cleaning the Interior ..................................
395
Cleaning the Instrument Panel and Instrument Cluster Lens .......................
397
Cleaning Leather Seats ............................
397
Repairing Minor Paint Damage .............
399
Cleaning the Wheels .................................
399
Vehicle Storage ...........................................
399
Wheels and Tires
General Information ..................................
402
Tire Care ........................................................
404
Using Snow Chains ....................................
420
Tire Pressure Monitoring System ...........
421
Changing a Road Wheel ..........................
429
Technical Specifications .........................
440
6
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Second-Printing Table of Contents

TOWING A TRAILER
WARNING: Do not exceed
the GVWR or the GAWR
specified on the certification
label. WARNING:
Towing trailers
beyond the maximum
recommended gross trailer
weight exceeds the limit of your
vehicle and could result in engine
damage, transmission damage,
structural damage, loss of
vehicle control, vehicle rollover
and personal injury. WARNING:
Do not exceed
the lowest rating capacity for
your vehicle or trailer hitch.
Overloading your vehicle or
trailer hitch can impair your
vehicle stability and handling.
Failure to follow this instruction
could result in the loss of control
of your vehicle, personal injury or
death. WARNING:
Do not cut,
drill, weld or modify the trailer
hitch. Modifying the trailer hitch
could reduce the hitch rating.
Your vehicle may have electrical
items, such as fuses or relays,
related to towing. See
Fuse
Specification Chart (page 339). Your vehicle may have ability to
modify trailer towing features.
See
General Information (page
110).
Your vehicle's load capacity
designation is by weight, not by
volume, so you cannot necessarily
use all available space when
loading a vehicle or trailer.
Towing a trailer places an extra
load on your vehicle's engine,
transmission, axle, brakes, tires
and suspension. Inspect these
components periodically during,
and after, any towing operation.
Note: To prevent your trailer from
accumulating distance, and the
trailer information status appearing
when you restart your vehicle after
disconnecting your trailer, you must
deactivate your trailer. Using the
information display, go to the
Towing menu and then the Select
Trailer option. Select the No active
trailer option. See
General
Information (page 110).
Load Placement
To help minimize how trailer
movement affects your vehicle
when driving:
• Load the heaviest items closest
to the trailer floor.
• Load the heaviest items
centered between the
left-hand and right-hand side
trailer tires.
282
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Second-Printing Towing

4. You can attempt to start the vehicle
by pressing the brake pedal and
START/STOP, or press START/STOP
without pressing the brake pedal.
5. If the vehicle does not start, repeat steps 1 through 4.
JUMP STARTING THE VEHICLE WARNING:
Batteries normally
produce explosive gases which can
cause personal injury. Therefore, do not
allow flames, sparks or lighted
substances to come near the battery.
When working near the battery, always
shield your face and protect your eyes.
Always provide correct ventilation. WARNING:
Keep batteries out of
reach of children. Batteries contain
sulfuric acid. Avoid contact with skin,
eyes or clothing. Shield your eyes when
working near the battery to protect
against possible splashing of acid
solution. In case of acid contact with skin
or eyes, flush immediately with water for
a minimum of 15 minutes and get prompt
medical attention. If acid is swallowed,
call a physician immediately. WARNING:
Use only adequately
sized cables with insulated clamps.
Preparing Your Vehicle
Do not attempt to push-start your
automatic transmission vehicle.
Note: Attempting to push-start a vehicle
with an automatic transmission may cause
transmission damage.
Note: Use only a 12-volt supply to start your
vehicle. Note:
Do not disconnect the battery of the
disabled vehicle as this could damage the
vehicle electrical system.
Park the booster vehicle close to the hood
of the disabled vehicle, making sure the
two vehicles do not touch.
Connecting the Jumper Cables WARNING:
Do not attach the
cables to fuel lines, engine rocker covers,
the intake manifold or electrical
components as grounding points. Stay
clear of moving parts. To avoid reverse
polarity connections, make sure that you
correctly identify the positive (+) and
negative (-) terminals on both the
disabled and booster vehicles before
connecting the cables. WARNING:
Do not attach the end
of the positive cable to the studs or
L-shaped eyelet located above the
positive (+) terminal of your vehicle ’s
battery. High current may flow through
and cause damage to the fuses. WARNING: Do not connect the end
of the second cable to the negative (-)
terminal of the battery to be jumped. A
spark may cause an explosion of the
gases that surround the battery.
Note: In the illustration, the bottom vehicle
represents the booster vehicle.
327
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Second-Printing Roadside Emergencies

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 379).
Replace fuses with the same type and
rating. See Changing a Fuse (page 346).
339
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Second-Printing FusesE306306

Protected Component
Fuse
Rating
Fuse
Number
Power point 4.
20 A
1
Power point 3.
20 A
2
Spot light module.
10 A
3
Four-wheel drive vacuum solenoid.
10 A
4
Active front steering.
40 A
5
Snow plow.
10 A
6
Trailer tow battery charge.
30 A
7
Anti-lock brake system module.
10 A
8
Electronic power assisted steering module.
10 A
9
Trailer tow park lamps.
30 A
10
Horn.
20 A
11
Torque overlay.
30 A
12
Power sliding rear window.
30 A
13
Body control module - battery power in feed 1.
40 A
14
Passenger seat power.
30 A
15
Powertrain control module.
10 A
16
Transmission control module.
Blind spot information system.
10 A
17
Four-wheel drive module.
10 A
18
Adaptive cruise control.
5 A
19
Heated mirrors.
15 A
20
Heated rear window.
40 A
21
On-board diagnostic module.
10 A
22
Smart data link connector.
Transmission control module.
15 A
23
Driver power seat.
30 A
24
Voltage quality module.
25 A
25
340
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Second-Printing Fuses

Protected Component
Fuse
Rating
Fuse
Number
Trailer tow battery charge.
30 A
26
Rear heated seats.
20 A
27
Glow plug (diesel).
25 A
28
Not used (gas).
—
Electric power assisted steering motor.
40 A
29
Not used (spare).
10 A
30
Power point 5.
20 A
31
Four-wheel drive module.
25 A
32
Alternator sense line 2.
10 A
33
Electric cooling fan (gas).
50 A
34
Supplemental air heater (diesel).
Power point 2.
20 A
35
Power point 1.
20 A
36
Anti-lock brake system pump.
60 A
37
Inverter.
60 A
38
Four-wheel drive module.
25 A
39
Starter motor solenoid.
30 A
40
Tailgate release solenoid.
10 A
41
Blower motor.
40 A
42
Trailer tow backup lamps.
10 A
43
Trailer tow lighting module.
40 A
44
Anti-lock brake system valve.
30 A
45
Compressed natural gas module power.
30 A
46
Supplemental air heater (diesel).
50 A
47
Not used (gas).
—
Supplemental air heater (diesel).
50 A
48
Not used (gas).
—
341
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Second-Printing Fuses

Protected Component
Fuse
Rating
Fuse
Number
Not used.
—
49
Heated and cooled seats.
30 A
50
Powertrain control module.
20 A
51
Compressed natural gas (gas).
15 A
52
Fuel rail pressure relief control (diesel).
Exhaust gas recirculation stepper motor (gas).
20 A
53
Universal exhaust gas oxygen sensors (gas).
Exhaust gas recirculation cooler bypass (diesel).
Urea pump motor controller (diesel).
Oxygen sensors.
A/C clutch relay power.
20 A
54
Fan clutch.
Rain sensor.
5 A
55
Windshield wipers.
30 A
56
Upfitter interface module.
10 A
57
Alternator sense line.
10 A
58
Power running boards.
30 A
59
Body control module - battery power in feed 2.
40 A
60
Telescopic mirror motors.
10 A
61
Trailer brake control.
40 A
62
Aftermarket e-brake access.
Multi-contour seats.
15 A
63
Ignition coil (gas).
20 A
64
Glow plug module (diesel).
Nitrogen oxide module (diesel).
Urea level and quality sensor (diesel).
Fuel pump.
30 A
65
A/C clutch solenoid.
10 A
66
Auxiliary lighting module.
40 A
67
Powertrain control module.
10 A
68
342
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Second-Printing Fuses

Protected Component
Fuse
Rating
Fuse
Number
Body control module power.
60 A
69
Trailer tow stop and turn lamps.
30 A
70
Note: Spare fuse amperage may vary.
Passenger Compartment Fuse
Panel
The fuse panel is in the right-hand side of
the passenger footwell behind a trim panel.
To remove the trim panel, pull it toward
you and swing it away from the side. To
reinstall it, line up the tabs with the grooves
on the panel, and then push it shut. Note:
It may be easier to access the fuse
panel if you remove the finish trim piece.
Replace fuses with the same type and
rating. See Changing a Fuse (page 346). Protected Component
Fuse
Rating
Fuse
Number
Not used.
—
1
Driver door pack switch.
10 A
2
Power sliding rear window switch.
Seat memory switch.
7.5 A
3
343
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Second-Printing FusesE145984