2021 FORD F-150 wiring

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
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Towing a Trailer

ADJUSTING THE INTEGRATED
TRAILER BRAKE CONTROLLER
MODE
Select the correct integrated trailer brake
controller mode option using the
touchscreen.
Note:
Trailer brake gain settings are saved
to the active trailer profile.
Selecting the Trailer Brake Type
1. Press Default for trailers with
electromagnetic drum brake systems
or press
Electric over Hydraulic for
trailers with electrically actuated
hydraulic brake systems. 2. Press
Save.
Selecting the Trailer Brake Effort
1. Select a setting for your trailer.
Note: The default value is
Low and is the
recommended setting for most trailers.
Select a different setting if your trailer's
brakes require more initial voltage, or you
prefer more aggressive trailer braking.
2. Press
Save.
INTEGRATED TRAILER BRAKE CONTROLLER –
TROUBLESHOOTING
INTEGRATED TRAILER BRAKE CONTROLLER – INFORMATION
MESSAGES Details
Message
The system detects the trailer wiring
connection is disconnected, during a given ignition cycle.
Trailer Disconnected
The system detects an electrical fault inthe trailer brake circuit. If this message
appears without a trailer attached, see your authorized dealer. If a trailer is attached, inspect and repair the trailer wiring.
Trailer Wiring Fault
Displays the current gain setting for thetrailer brake.
Trailer Brake Gain: {trailer gain value:#0.0}
Displays the current gain setting for the
trailer brake when you do not have a trailer connected.
Trailer Brake Gain: {trailer gain value:#0.0}
No Trailer
436
F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Integrated Trailer Brake Controller
(If Equipped)

INTEGRATED TRAILER BRAKE
CONTROLLER – FREQUENTLY
ASKED QUESTIONS
How do I determine if there is an issue
with the wiring on my vehicle?
A message displays accompanied by
a single tone, when no trailer is
connected. This indicates that the
issue is between the trailer brake
controller and the 7-pin connector at
the bumper.
How do I determine if there is an issue
with the wiring on my trailer? A message only displays with a trailer
connected. Consult your trailer dealer
for assistance.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Integrated Trailer Brake Controller (If Equipped)

WHAT IS TRAILER HITCHING
ASSISTANCE
Trailer hitching assistance helps the driver
align the vehicle hitch ball to a trailer
coupler.
HOW DOES TRAILER HITCHING
ASSISTANCE WORK
Trailer hitching assistance uses the
following to detect your trailer:
•
Rear view camera.
• Radar.
• Parking aid sensors.
• External rear lighting.
This feature also controls the following to
align the hitch ball with the trailer coupler:
• Steering.
• Shifting.
• Braking and acceleration.
Note: Blocked sensors could affect system
performance. Do not cover the sensors with
bumper stickers, tape, repair compound or
other objects.
TRAILER HITCHING
ASSISTANCE PRECAUTIONS WARNING: You are responsible for
controlling your vehicle at all times. The
system is designed to be an aid and does
not relieve you of your responsibility to
drive with due care and attention. Failure
to follow this instruction could result in
the loss of control of your vehicle,
personal injury or death. WARNING: The system is not
designed to detect cyclists,
motorcyclists, pedestrians or animals.
Apply the brakes when necessary. Failure
to follow this instruction could result
personal injury or death. WARNING:
The system may not
operate properly during severe weather
conditions, for example snow, ice, heavy
rain and spray. Always drive with due
care and attention. Failure to take care
may result in a crash.
Note: Trailer hitching assistance only works
with conventional trailers, couplers and
hitch balls.
Note: The hitch ball must be properly
installed on the vehicle for the system to
function as intended. An improperly
installed hitch ball could result in damage
to your vehicle or trailer.
Note: Certain aftermarket modifications
such as oversized tires or lift kits could make
trailer hitching assistance fail or not work
as intended.
Note: Keep the sensors and camera free
from snow, ice and dirt.
Note: Clean the camera lens with a soft,
lint-free cloth and non-abrasive cleaner.
TRAILER HITCHING
ASSISTANCE LIMITATIONS
The system could not function or could
function with reduced performance during
the following:
• When using trailer hitching assistance
in tall grass and weeds.
• When safety chains, cables or wiring
are dangling near the coupler.
• When using trailer hitching assistance
on slippery surfaces.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Trailer Hitching Assistance

Positioning the Trailer
Hitch the trailer to your vehicle and
connect the electrical wiring harness.
Check to make sure that the wiring is
working. See Connecting a Trailer (page
424).
Park your vehicle and hitched trailer on a
level surface.
For best results, make sure that your trailer
rides level with the ground when you hitch
your vehicle. See
Connecting a Trailer
(page 424). Make sure that the trailer and your vehicle
are in line with each other. You can do this
by putting the transmission in drive (D) and
pulling straight forward.
Configuring the Trailer in the
Touchscreen
1. Press the button to switch the system
on.
2. Press
Add Trailer on the touchscreen.
3. Follow the directions on the touchscreen to enter the trailer name
and trailer type, then proceed to the
sticker or sensor setup.
Note: If you configure the trailer and install
a sensor, the trailer is saved with that sensor
information. If you want to use this trailer
with the sticker, you need to delete the
trailer from the system and repeat the setup
process.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Trailer Backup AssistanceE209766 E209759 E209760 E310335

Note:
Your vehicle has two options for the
trailer reversing aid setup. If your vehicle
came with a trailer sensor kit or if a message
displays to install a sensor, follow the sensor
installation instructions. See Trailer Sensor
Installation (page 448). If your vehicle did
not come with a trailer sensor kit, follow the
sticker installation instructions. See
Applying the Trailer Reversing Aid Sticker
(page
448).
Note: If your vehicle came with a trailer
sensor kit, the vehicle will receive an update
that allows the system to operate with a
sensor or sticker. If your vehicle did not come
with a trailer sensor kit, your vehicle can be
setup using either method, but you need to
separately purchase the trailer sensor kit
from your authorized dealer.
APPLYING THE TRAILER
REVERSING AID STICKER
Place the sticker in an area visible by the
rear view camera. The entire sticker must
be within
4– 19 in (10–48 cm) from the
center of the hitch ball, as shown in the
following illustration. Use the supplied sticker placement card,
a tape measure and pen to carefully mark
the area to attach the sticker. The sticker
is in the back cover pocket of your quick
start guide. Make sure the entire sticker is
within the green zone between the two
arcs or distance markers on the diagram,
and is also visible in the rear view camera
display.
Once you have found the correct location,
place the sticker.
Note:
Make sure nothing can obstruct the
rear view camera's view of the sticker such
as a jack handle or wiring.
Note: Position the sticker on a flat, dry and
clean horizontal surface. For best results,
apply the sticker when temperatures are
above
32°F (0°C).
Note: Do not move stickers after placing
them. Do not re-use any stickers if removed.
Note: You can purchase additional stickers
through your authorized dealer.
Note: If you previously setup the trailer with
the trailer sensor, make sure it is not plugged
in before configuring the trailer and placing
the sticker.
TRAILER SENSOR INSTALLATION 448
F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Trailer Backup AssistanceE333148 E315959

Description
Message
Displays when the system does not detect
the sensor. Check the sensor connection,
check that there is no damaged wiring
between the connector and sensor and
check that there is only one sensor
connected.
If you do not want to use the sensor for this
trailer, delete the trailer in the touchscreen
then repeat the setup process with the
sticker.
Pro Trailer Backup Assist™ Sensor Not
Detected Refer to Owner's Manual Press
Knob to Exit
These messages display when the system
does not detect the trailer.
If your trailer is setup with a sticker, make
sure the rear camera is clean, and the
sticker is clearly visible in the camera image.
You can also move the trailer forward or
backward to change the trailer position and
lighting conditions.
If your trailer is setup with a sensor, check
that the sensor is correctly installed and
the trailer length is within the allowed
range.
If these messages continue to display, visit
your authorized dealer to have your vehicle
checked.
Pro Trailer Backup Assist™ Trailer Not
Detected. Shift to Park Press Knob to Exit
Pro Trailer Backup Assist™ Trailer Not
Detected. Refer to Owner's Manual. Press
Knob to Exit
454
F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Trailer Backup Assistance

TRAILER BACKUP ASSISTANCE
– FREQUENTLY ASKED
QUESTIONS
Why does the trailer not reverse
straight?
Verify the sensor is correctly installed.
Other factors such as the hitch
connection, road camber, road slope
and trailer suspension could influence
how straight the system can reverse
the trailer when the control knob is not
turned. You can compensate for the
trailer drifting to the right or left by
slowly turning the knob until the trailer
is following your desired path and then
holding the knob in that position.
Why does the system not detect a
sensor? There could be an issue with the
connection, the wiring harness could
be damaged, you could have multiple
sensors connected or the sensor could
be incorrectly installed. Check that the
12-way connector is fully inserted into
the 12-way socket. The red rubber seal
is not visible when the connector is
fully inserted. Also check that the
wiring harness sensor connection is
fully inserted at the trailer sensor, and
check for damaged wiring between
the 12-way connector and the trailer
sensor. Also, check that the sensor is
installed on a vertical surface with the
arrows pointing straight up. What does it mean if the system
remains on one message for an
extended time during calibration when
setting up the system with the sticker?
The camera could need to be cleaned,
the sticker could be blocked, the
drawbar could be outside the allowed
range of 4–19 in (10–48 cm) or you
could need to move to a different area
to change the lighting and background.
Verify the sticker is in the proper
location. See
Applying the Trailer
Reversing Aid Sticker (page 448).
You can move to a different area or
change the direction you are driving or
setup the system at a different time
of day. Some trailers are not
compatible with the sticker and
camera system. If the issue persists
with the sticker setup, you may choose
to setup the trailer with a sensor.
What does it mean if the system pauses
during calibration? There could be steering input or trailer
movement during the straight drive
portion of the calibration process.
What does it mean if the system
remains on one message for an
extended time during calibration when
setting up the system with the sensor? The sensor could be incorrectly
installed, the trailer length could be
outside the allowed range or the road
surface could be too rough or bumpy.
What does it mean if the system
displays hold steering steady during
turn? Part of the calibration process for the
sticker setup requires a steady turn. If
you are continually moving the
steering wheel during the turn, this
delays the calibration process. To
enable the calibration process, hold
the steering wheel at the same
position when turning.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Trailer Backup Assistance