Ford F-150 2018 Owner's Manual page 260

Note: The system does not operate in
reverse (R).
System Lights and Messages
E142442
When the system detects a vehicle, an
alert indicator illuminates in the exterior
mirror on the side the approaching vehicle
is coming from. If you turn the direction
indicator on for that side of your vehicle,
the alert indicator flashes.
Note: The system may not alert you if a
vehicle quickly passes through the detection
zone.
Blocked Sensors
E190708
The sensors are inside the brake lamp on
both sides of your vehicle.
Note: Keep the sensors free from snow, ice
and large accumulations of dirt.
F-150 (TFC) Canada/United States of America, enUSA, Edition date: 201709, Second Printing
Driving Aids
Note: Do not cover the sensors with bumper
stickers, repair compound or other objects.
Note: Blocked sensors could affect system
performance.
If the sensors become blocked, a message
may appear in the information display. See
Information Messages (page 123). The
alert indicators remain illuminated but the
system does not alert you.
Blind Spot Information System
with Trailer Tow
E225007
The system is designed to detect vehicles
that may have entered the blind spot zone
(A). The detection area is on both sides of
your vehicle and trailer, extending rearward
from the exterior mirrors to the end of your
trailer.
The system turns on when all of the
following occur:
• You attach a trailer to your vehicle.
• You have set up the trailer to work with
the system through the information
display.
• You start your vehicle.
• You shift into drive (D).
• The vehicle speed is greater than
6 mph (10 km/h).
257
(If Equipped)