2021 FORD F-150 tires

Switching Adaptive Cruise Control
Off
Press the button when the
system is in standby mode or
switch the ignition off.
Note: When you switch the system off, the
set speed clears.
ADAPTIVE CRUISE CONTROL
AUTOMATIC CANCELLATION
The system may cancel if:
• The tires lose traction.
• You apply the parking brake.
The system may cancel and set the parking
brake if:
• You unbuckle the seatbelt and open
the driver door after you stop your
vehicle.
• Your vehicle is at a stop continuously
for more than three minutes.
The system may deactivate or prevent
activating when requested if:
• The vehicle has a blocked sensor.
• The brake temperature is too high.
• There is a failure in the system or a
related system.
SETTING THE ADAPTIVE
CRUISE CONTROL SPEED
Drive to the speed you prefer. Press the SET+ or SET- buttons
to set the current speed.
Take your foot off the accelerator pedal. The indicator, current gap setting and set
speed appear in the instrument cluster
display.
A vehicle image illuminates if there is a
vehicle detected in front of you.
Note:
When adaptive cruise control is
active, the speedometer may vary slightly
from the set speed displayed in the
instrument cluster display.
Setting the Adaptive Cruise Speed
from a Complete Stop Press the SET+ or SET- buttons
while keeping the brake pedal
fully depressed.
The set speed adjusts to 20 km/h when in
metric units or 15 mph when in imperial
units.
The indicator, current gap setting and set
speed appear in the instrument cluster
display.
Note: The system activates from a
complete stop only when it detects a lead
vehicle in close proximity.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Adaptive Cruise Control (If Equipped)E144529 E337576

Normal is the default steering and exhaust
modes. Off-road steering mode is not
available. All exhaust modes are available.
Sport is the default suspension mode.
Normal suspension mode is available.
Off-road suspension mode is not available.
The system tunes the engine and
transmission controls to tow mode.
The system tunes the stability and traction
controls to normal mode.
The electronic locking differential is
available below 25 mph (40 km/h). See
Switching the Electronic Locking
Differential On and Off
(page 303).
TOW/HAUL - 4X4 For improved transmission
operation when towing a trailer
or a heavy load. This mode
moves upshifts to higher engine speeds to
reduce the frequency of transmission
shifting. This mode also provides engine
braking in all forward gears, which slows
your vehicle and assists you in controlling
your vehicle when descending a slope. The
amount of downshift braking provided
varies based on the amount you press the
brake pedal.
All four-wheel drive modes are selectable
in tow/haul mode. This mode does not
default to a certain four-wheel drive mode
and maintains the previous selection.
The system tunes the steering and
suspension to enhance driving comfort
when towing or carrying heavy loads.
The electronic locking differential is
available below
25 mph (40 km/h). See
Switching the Electronic Locking
Differential On and Off
(page 303). TOW/HAUL - 4X2 For improved transmission
operation when towing a trailer
or a heavy load. This mode
moves upshifts to higher engine speeds to
reduce the frequency of transmission
shifting. This mode also provides engine
braking in all forward gears, which slows
your vehicle and assists you in controlling
your vehicle when descending a slope. The
amount of downshift braking provided
varies based on the amount you press the
brake pedal.
The system tunes the steering and
suspension to enhance driving comfort
when towing or carrying heavy loads.
The electronic locking differential is
available below
25 mph (40 km/h). See
Switching the Electronic Locking
Differential On and Off
(page 305).
TRAIL - 4X2 Trail mode is for off-road driving
on muddy, rutted, soft or uneven
terrain. This mode lowers
throttle response to increase wheel spin
to keep the tires clear and to prevent
getting stuck.
The electronic locking differential is
available below
25 mph (40 km/h). See
Switching the Electronic Locking
Differential On and Off
(page 305).
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Drive Mode ControlE246592 E246592 E295419

Why does the vehicle not come back toward the middle of the lane, as expected, in the
Aid, or Aid + Alert mode?
High cross winds are present. There is a large road crown.
Rough roads, grooves or shoulder drop-offs.
Heavy, uneven loading of the vehicle or improper tire inflation pressure. You changed the tires or modified the suspension.
388
F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Lane Keeping System (If Equipped)

LOAD CARRYING
PRECAUTIONS
Keep your loaded vehicle weight
within its design rating capability,
with or without a trailer. Properly
loading your vehicle provides
maximum return of vehicle design
performance. Before you load your
vehicle, become familiar with the
following terms for determining
your vehicle
’s weight rating, with
or without a trailer, from the
vehicle ’s Tire and Loading
Information label or Safety
Compliance Certification label. WARNING: Vehicles with
a higher center of gravity (utility
and four-wheel drive vehicles)
handle differently than vehicles
with a lower center of gravity
(passenger cars). Avoid sharp
turns, excessive speed and
abrupt steering in these vehicles.
Failure to drive cautiously
increases the risk of losing
control of your vehicle, vehicle
rollover, personal injury and
death. WARNING:
The
appropriate loading capacity of
your vehicle can be limited either
by volume capacity (how much
space is available) or by payload
capacity (how much weight the
vehicle should carry). Once you
have reached the maximum payload of your vehicle, do not
add more cargo, even if there is
space available. Overloading or
improperly loading your vehicle
can contribute to loss of vehicle
control and vehicle rollover.
WARNING:
Exceeding the
Safety Compliance Certification
label vehicle weight limits can
adversely affect the
performance and handling of
your vehicle, cause vehicle
damage and can result in the
loss of control of your vehicle,
serious personal injury or death. WARNING:
Do not use
replacement tires with lower
load carrying capacities than the
original tires because they may
lower your vehicle's GVWR and
GAWR limitations. Replacement
tires with a higher limit than the
original tires do not increase the
GVWR and GAWR limitations. WARNING:
Do not exceed
the GVWR or the GAWR
specified on the certification
label. WARNING: Exceeding any
vehicle weight rating can
adversely affect the
performance and handling of
your vehicle, cause vehicle
damage and can result in the
loss of control of your vehicle,
serious personal injury or death.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Load Carrying

CONNECTING A TRAILER – TROUBLESHOOTING
CONNECTING A TRAILER – INFORMATION MESSAGES
Description
Message
The system senses a trailer connection
becomes disconnected, either intentionally or unintentionally, during a given ignition cycle.
Trailer Disconnected
There are certain faults in your vehicle
wiring and trailer wiring or brake system.
Trailer Wiring Fault
There is a fault with your trailer battery, oryour trailer battery voltage is very low.
Trailer Battery Not Charging See Manual
One or more tires on your trailer is belowthe specified tire pressure.
Trailer Tire Low Specified:
Displays when one or more tires on the
trailer is above the recommended temper- ature.
Trailer Tire Over Temperature
A trailer tire pressure sensor is malfunc-
tioning. If the warning stays on or continues to come on, have the system checked as soon as possible.
Trailer Tire Pressure Sensor Fault
The trailer tire pressure monitoring systemis malfunctioning. If the warning stays on
or continues to come on, have the system checked.
Trailer Tire Pressure Monitor Fault
The system cannot detect the trailer tirepressure monitoring system.
Trailer Tire Pressure Monitor Capability Not
Detected
The trailer tire pressure monitoring systemis not setup.
Trailer Tire Pressure Indication Not Setup
See Manual
427
F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Connecting a Trailer

Certain states require functioning trailer
brakes for trailers over a specified weight.
Be sure to check state regulations for this
specified weight.
Ford Motor Company recommends
separate functioning brake systems for
trailers weighing more than 1,500 lb
(680 kg) when loaded.
TOWING A TRAILER
LIMITATIONS
The 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.
Note: Your vehicle could have
reduced performance when
operating at high altitudes and
when heavily loaded or towing a
trailer. When driving at elevation,
to match driving performance as
perceived at sea level, reduce gross
vehicle weight and gross
combination weight by 2% per
1,000 ft (300 m)
elevation.
LOADING YOUR TRAILER
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 and
right side trailer tires. •
Load the heaviest items above
the trailer axles or just slightly
forward toward the trailer
tongue. Do not allow the final
trailer tongue weight to go
above or below 10-15% of the
loaded trailer weight. The
trailer tongue weight should
never exceed 10% of the
maximum towing capacity.
• Select a ball mount with the
correct rise or drop. When both
the loaded vehicle and trailer
are connected, the trailer frame
should be level, or slightly
angled down toward your
vehicle, when viewed from the
side.
TRAILER TOWING HINTS
Towing a trailer places an extra load on
your vehicle's engine, transmission, axle,
brakes, tires and suspension. Periodically
inspect these components during and after
any towing operation.
When driving with a trailer or payload, a
slight takeoff vibration or shudder may be
present due to the increased payload
weight.
Your vehicle may have a temporary or
conventional spare tire. A temporary spare
tire is different in diameter or width,
tread-type, or is from a different
manufacturer than the road tires on your
vehicle. Consult information on the tire
label or Safety Compliance label for
limitations when using.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Towing a Trailer

When towing a trailer:
•
Obey country specific regulations for
towing a trailer.
• Do not drive faster than 70 mph
(113 km/h) during the first 500 mi
(800 km).
• Do not make full-throttle starts.
• Check your hitch, electrical connections
and trailer wheel lug nuts thoroughly
after you have traveled 50 mi (80 km).
• When stopped in congested or heavy
traffic during hot weather, place the
transmission 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 when you are
towing on long, steep slopes.
• Shift to a lower gear when driving down
a long or steep hill. Do not continuously
apply the brakes, as they may overheat
and become less effective.
• If your transmission has Grade Assist
or Tow/Haul, use this feature when
towing. This provides engine braking
and helps eliminate excessive
transmission shifting for optimum fuel
economy and transmission cooling.
• Your vehicle has AdvanceTrac with roll
stability control. When towing a trailer,
additional loads could cause the
AdvanceTrac system to engage during
cornering maneuvers. Reduce cornering
speeds to make sure that you can
maintain control of the vehicle and
trailer if the AdvanceTrac system
engages. •
Allow more distance for stopping with
a trailer attached. Anticipate stops and
gradually brake.
• Avoid parking on a slope. However, if
you must park on a slope, turn the
steering wheel to point your vehicle
tires away from traffic flow, set the
parking brake, place the transmission
in park (P) and place wheel chocks in
front and back of the trailer wheels.
Note: Chocks are not included with your
vehicle.
LAUNCHING OR RETRIEVING
A BOAT OR PERSONAL
WATERCRAFT
When backing down a ramp during boat
launching or retrieval:
• Do not allow the static water level to
rise above the bottom edge of the rear
bumper.
• Do not allow waves to break higher
than
6 in (15 cm) above the bottom
edge of the rear bumper.
Exceeding
6 in (15 cm) could allow water
to enter vehicle components, causing
internal damage to the components and
affecting driveability, emissions and
reliability.
Note: Replace the rear axle lubricant
anytime the rear axle has been submerged
in water.
Note: Disconnect the trailer wiring
connector before backing the trailer into the
water.
Note: Reconnect the trailer wiring
connector after removing the trailer from
the water.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Towing a Trailer

TOWING A TRAILER – TROUBLESHOOTING
TOWING A TRAILER – INFORMATION MESSAGES
Details
Message
The left-hand trailer turn lamp requiresservice.
Trailer Left Turn Lamps Fault Check Lamps
The right-hand trailer turn lamp requiresservice.
Trailer Right Turn Lamps Fault Check
Lamps
The trailer battery voltage is too low to
charge. If there is no trailer attached, the vehicle battery voltage is low.
Trailer Battery Not Charging See Manual
The system detects a short created by thetrailer lamps. Inspect and repair the trailer
wiring, or have the system checked as soon as possible.
Trailer Lighting Module Fault See Manual
The trailer stoplamps require service.
Trailer Stop Lamps Fault Check Lamps
The trailer sway control detects trailersway. Reduce the vehicle's speed.
Trailer Sway Reduce Speed
Displays when one or more tires on the
trailer is above the recommended temper- ature.
Trailer Tire Over Temperature
One or more tires on your trailer is belowthe specified tire pressure.
Trailer Tire Low Specified:
A trailer tire pressure sensor requires
service. If the warning stays on or continues to come on, have the system checked as soon as possible.
Trailer Tire Pressure Sensor Fault
The trailer tire pressure monitoring systemrequires service. If the warning stays on or continues to come on, have the system checked as soon as possible.
Trailer Tire Pressure Monitor Fault
The system cannot detect the trailer tirepressure monitoring system.
Trailer Tire Pressure Monitor Capability Not
Detected
The trailer tire pressure monitoring systemis not setup.
Trailer Tire Pressure Indication Not Setup
See Manual
433
F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Towing a Trailer