2021 FORD F-350 lights

•
Your vehicle's brake system and the
trailer brake system work
independently of each other. Changing
the gain setting on the controller does
not affect the operation of your
vehicle's brakes.
• When you switch the engine off, the
controller output is disabled and the
display and module shut down.
Trailer Lamps WARNING: Never connect any
trailer lamp wiring to the vehicle's tail
lamp wiring; this may damage the
electrical system resulting in fire. Contact
your authorized dealer as soon as
possible for assistance in proper trailer
tow wiring installation. Additional
electrical equipment may be required.
Trailer lamps are required on most towed
vehicles. Make sure all running lights, brake
lights, turn signals and hazard lights are
working.
Before Towing a Trailer
Practice turning, stopping and backing up
to get the feel of your vehicle-trailer
combination before starting on a trip.
When turning, make wider turns so the
trailer wheels clear curbs and other
obstacles.
When Towing a Trailer
• Check your hitch, electrical connections
and trailer wheel lug nuts thoroughly
after you have traveled 50 mi (80 km).
• Do not drive faster than
70 mph
(113 km/h) during the first 500 mi
(800 km).
• Do not make full-throttle starts. •
When stopped in congested or heavy
traffic during hot weather, place the
gearshift in park (P) to aid engine and
transmission cooling and to help A/C
performance.
• Turn off the speed control with heavy
loads or in hilly terrain. The speed
control may turn off automatically
when you are towing on long, steep
grades.
• Shift to a lower gear when driving down
a long or steep hill. Do not apply the
brakes continuously, as they may
overheat and become less effective.
• If your transmission is equipped with a
Grade Assist or Tow/Haul feature, use
this feature when towing. This provides
engine braking and helps eliminate
excessive transmission shifting for
optimum fuel economy and
transmission cooling.
• If your vehicle is equipped with
Adaptive Steering and you have
enabled Tow/Haul, the Adaptive
Steering system adjusts the steering
response to match your vehicle ’s load.
The system reduces vehicle sensitivity
to steering inputs at higher vehicle
speeds while it maintains the ease of
parking and maneuverability at low
speeds.
• If your vehicle is equipped with
AdvanceTrac with RSC, this system
may turn on during typical cornering
maneuvers with a heavily loaded trailer.
This is normal. Turning the corner at a
slower speed while towing may reduce
this tendency.
• If you are towing a trailer frequently in
hot weather, hilly conditions, at the
gross combined weight rating (or any
combination of these factors), consider
refilling your rear axle with synthetic
gear lubricant (if the axle is not already
filled with it). See
Capacities and
Specifications (page 441).
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Towing

•
Inspect exhaust system for damage or
looseness.
• Inspect undercarriage fasteners. If any
are loose or damaged, tighten or
replace ensuring that the proper torque
specification is used.
• Inspect the tires for any cuts in the
tread or sidewall area. Also inspect the
sidewall for any bulge indicating
damage to the tire.
• Inspect the wheels for dents, cracks,
or other damage.
• Refit the front license plate if removed
previously.
BREAKING-IN
You need to break in new tires for
approximately 300 mi (480 km). During
this time, your vehicle may exhibit some
unusual driving characteristics.
Avoid driving too fast during the first
1,000 mi (1,600 km)
. Vary your speed
frequently and change up through the
gears early. Do not labor the engine.
Drive your new vehicle at least
1,000 mi
(1,600 km) before towing a trailer. Make
sure you use the specified engine oil. See
Engine Oil Capacity and Specification
(page
449).
Do not add friction modifier compounds
or special break-in oils during the first few
thousand miles (kilometers) of operation.
These additives may prevent piston ring
seating.
DRIVING THROUGH WATER WARNING:
Do not drive through
flowing or deep water as you may lose
control of your vehicle. Note:
Engine damage can occur if water
enters the air filter.
For Vehicles without Tremor Off-
Road Package
Note: Driving through standing water can
cause vehicle damage.
Note: Drive through water in an emergency
only and not as part of normal driving.
Before driving through standing water,
check the depth. Never drive through water
that is higher than the bottom of the wheel
hubs. When driving through standing water, drive
very slowly and do not stop your vehicle.
Your brake performance and traction may
be limited. After driving through water and
as soon as it is safe to do so:
•
Lightly press the brake pedal to dry the
brakes and to check that they work.
• Check that the horn works.
• Check that the exterior lights work.
• Turn the steering wheel to check that
the steering power assist works.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Driving HintsE176913

12.
Turn the ignition off. If two short horn
beeps are heard, the reset procedure
was unsuccessful and you must
repeat it. If after repeating the
procedure and two short beeps are
heard when the ignition is turned to
off, seek assistance from your
authorized dealer.
13. Set all six tires to the recommended air pressure as indicated on the
Safety Compliance Certification
Label, affixed to either the door hinge
pillar, door-latch post, or the door
edge that meets the door-latch post,
next to the driver seating position or
Tire Label located on the B-Pillar or
the edge of the driver door.
Trailer Tire Pressure Monitoring
System (If Equipped)
Note: Additional equipment may be
required for your vehicle to support trailer
tire pressure monitoring. See your authorized
dealer for more information.
Note: The trailer tire pressure monitoring
system is not a substitute for proper tire
maintenance. It is your responsibility to
maintain correct tire pressures at all times.
Note: If a trailer tire is repaired, replaced or
broken down for service, the screw and valve
on the trailer tire pressure sensor should be
replaced. See your authorized dealer for
details. The trailer tire pressure monitoring system
is an added safety feature that allows you
to view your trailer tire pressures through
the information display.
See General
Information (page 110). Tire pressure
sensors are mounted into each tire on your
trailer. The sensors send a message to your
vehicle indicating the current trailer tire
pressure.
If the trailer tire pressure monitoring
system detects that a tire is low, a warning
message appears in the information
display. The trailer tire pressure status
screen in the information display highlights
the tire with a low pressure.
The main function of the trailer tire
pressure monitoring system is to warn you
when your trailer tires need air. It can also
warn you in the event the system is no
longer capable of functioning as intended.
See
Information Messages (page 121).
When a Temporary Spare or New Tire
is Installed
If you have replaced a trailer tire with a new
or spare tire, a warning message appears
and pressure readings are no longer
displayed for that tire.
To restore the full function of the trailer
tire pressure monitoring system:
• Have the damaged wheel and tire
assembly repaired and remounted to
your trailer.
• Install the trailer tire pressure
monitoring sensor into the new wheel
and tire assembly.
• Perform the trailer tire pressure
monitoring system reset procedure.
Trailer Tire Pressure Monitoring
System Reset Procedure
Note: You need to perform the tire pressure
monitoring system reset procedure after
each tire rotation, or when a new trailer tire
pressure sensor is installed into a trailer tire.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Wheels and TiresE235807

Check Every Month
Air filter restriction gauge. 1
Engine oil level.
Function of all interior and exterior lights.
Tires including the spare for wear and proper pressure. Windshield washer fluid level.
Fuel and water separator. Drain if necessary or if indicated by the information display. 1
Holes and slots in the tail pipe to make sure they are functional and clear of debris. 1
1 Diesel vehicles only. Check Every Six Months
Battery connections. Clean if necessary.
Body and door drain holes for obstructions. Clean if necessary. Cooling system fluid level and coolant strength.
Door weatherstrips for wear. Lubricate if necessary.
Hinges, latches and outside locks for proper operation. Lubricate if necessary. Parking brake for proper operation.
Safety belts and seat latches for wear and function.
Safety warning lamps, brake, ABS, airbag and safety belt for operation.
Washer spray and wiper operation. Clean or replace blades as necessary.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Scheduled Maintenance

Transfer Case Fluid Capacity and
Specification..............................................466
Transfer Case Fluid Check.........................377
Transmission.................................................207
Transporting the Vehicle
...........................329
U
Under Hood Overview - 6.2L...................349
Under Hood Overview - 6.7L Diesel............................................................350
Under Hood Overview - 7.3L.....................351
Under Seat Storage
.......................................171
Front Under Seat Storage Compartment -
Vehicles With Locking Storage.................. 172
Front Under Seat Storage Compartment - Vehicles Without Locking Storage............171
Rear Under Seat Storage.................................. 172
Universal Garage Door Opener...............164 HomeLink Wireless Control System...........164
USB Port
.........................................................487
Locating the USB Ports................................... 487
Using Adaptive Cruise Control................243 Automatic Cancellation................................... 247
Blocked Sensor.................................................. 248
Canceling the Set Speed................................ 246
Changing the Set Speed................................. 246
Detection Issues................................................. 247
Following a Vehicle........................................... 244
Hilly Condition and Trailer Tow Usage................................................................. 247
Overriding the Set Speed............................... 246
Resuming the Set Speed................................ 246
Setting the Adaptive Cruise Speed............244
Setting the Gap Distance............................... 245
Switching Adaptive Cruise Control Off....................................................................... 247
Switching Adaptive Cruise Control On....................................................................... 244
Switching to Normal Cruise Control...........249
System Not Available...................................... 248
Using Four-Wheel Drive.............................213 4WD Indicator Lights......................................... 213
Driving Off-Road With Truck and Utility Vehicles............................................................. 216
Electronic Shift-On-the-Fly (ESOF) 4WD system................................................................ 213Entering and Exiting Rock Crawl Mode with
Tremor Package............................................. 215
How Your Vehicle Differs from Other Vehicles............................................................. 216
Operating 4WD Vehicles with Spare or Mismatched Tires.......................................... 215
Using the Electronic Shift on the Fly 4WD system................................................................ 214
Using Hill Descent Control.......................232 Hill Descent Modes........................................... 232
Using MyKey With Remote Start Systems..........................................................64
Using Power Running Boards....................78 Automatic Power Deploy.................................. 78
Automatic Power Stow...................................... 78
Bounce-back.......................................................... 79
Enabling and Disabling...................................... 79
Manual Power Deploy........................................ 78
Using Snow Chains.....................................420
Using Stability Control...............................229 AdvanceTrac® with Roll Stability Control ™
(RSC®)............................................................. 229
Using SYNC™ With Your Media Player............................................................503
Audio Voice Commands................................. 504
Media Sources.................................................... 503
Using SYNC™ With Your Phone...........499 Accessing Features through the Phone
Menu................................................................. 500
Pairing a Phone.................................................. 499
Phone Controls.................................................. 500
Phone Voice Commands............................... 499
Using Traction Control................................227 Switching the System Off............................... 227
System Indicator Lights and Messages.......................................................... 227
Using Voice Recognition
...........................497
Apps....................................................................... 520
Automatic Blower Motor Speed Reduction.......................................................... 521
Climate.................................................................... 517
Entertainment..................................................... 516
General................................................................... 515
Initiating a Voice Session................................ 497
Navigation............................................................. 519
Phone...................................................................... 518
SiriusXM Traffic and Travel Link................... 520
System Interaction and Feedback.............498
661
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Index