2018 FORD F-150 relay

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. 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
Information
Displays (page 113).
Your vehicle may have electrical
items, such as fuses or relays,
related to towing. See
Fuses
(page 335).
Your vehicle may have ability to
modify trailer towing features.
See
General Information (page
113).
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.
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F-150 (TFC) Canada/United States of America, enUSA, Edition date: 201709, Fifth-Printing Towing

SNOWPLOWING
We recommend the four-wheel drive F-150
in XL, XLT or Lariat trim levels with the 5.0L
engine and snowplow option for residential
snowplowing only. We do not recommend
the F-150 with the automatic four-wheel
drive system for snowplowing.
Do not use F-150 vehicles equipped with
the 2.7L, 3.0L, 3.3L or 3.5L engines for
snowplowing.
Installing the Snowplow
Weight limits and guidelines for selecting
and installing the snowplow are in the Ford
Truck Body Builders Layout Book,
snowplow section, found at
www.fleet.ford.com/truckbbas.
A typical installation affects the following:
•
Certification to government safety laws
such as occupant protection and airbag
deployment, braking, and lighting. Look
for an Alterer ’s Label on your vehicle
from the snowplow installer certifying
that the installation meets all
applicable Federal Motor Vehicle
Safety Standards (FMVSS).
• The Front Gross Axle Weight Rating
(GAWR) is on the upper left side of the
vehicle ’s Safety Compliance
Certification Label. This is the total
weight that front axle supports, which
includes the vehicle weight plus any
auxiliary equipment such as snowplow
frame-mounted hardware that can be
added to the vehicle and satisfy Ford
compliance certification to FMVSS. Do
not exceed FGAWR or Gross Vehicle
Weight Rating (GVWR).
• Rear ballast weight behind the rear
axle may be required to prevent
exceeding the FGAWR, and provide
front-to-rear weight balance for proper
braking and steering. •
Front wheel toe may require
re-adjustment to prevent premature
uneven tire wear. Specifications are in
the Ford Workshop Manual.
• Headlight aim may require adjustment.
• The tire air pressures recommended
for general driving are on the vehicle ’s
Safety Certification Label. The
maximum cold inflation pressure for
the tire and associated load rating are
on the tire sidewall. Tire air pressure
may require re-adjustment within these
pressure limits to accommodate the
additional weight of the snowplow
installation.
• Federal and some local regulations
require additional exterior lamps for
snowplow-equipped vehicles. Contact
an authorized dealer for additional
information.
Snowplow Mode (If Equipped)
Press the snowplow button on the
instrument panel to switch on snowplow
mode. The button illuminates when in
snowplow mode. A message appears in
the information display indicating that
features are turned off when in snowplow
mode.
The following features are disabled when
in snowplow mode:
• 110V inverter.
• Fog lamps.
• Heated steering wheel.
• Heated front and rear seats.
• Massaging seats.
The body module also activates the
snowplow relay that provides power to
aftermarket snowplow controls.
Switch off snowplow mode by pressing
the snowplow button or switching off the
ignition. The snowplow button is no longer
illuminated and features are turned on.
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F-150 (TFC) Canada/United States of America, enUSA, Edition date: 201709, Fifth-Printing Driving Hints

Protected Components
Fuse Rating
Fuse Number
Horn.
25A 1
1
Electric fan 1.
50A 2
2
Windshield wiper motor.
30A 2
3
Body control module.
60A 2
4
Starter relay.
30A 2
5
Power point 1.
20A 2
6
Power point 2.
20A 2
8
Rain sensor.
5A 1
10
Upfitter 1 relay (Raptor).
15A 2
12
4x4 run/start.
10A 1
13
Adaptive cruise control run/start module.
Not used (spare).
15A 1
14
Front view camera.
7.5A 1
15
Voltage quality module.
Not used (spare)(Raptor).
15A 1
Powertrain control module.
10A 1
16
Transmission control module run/start.
Anti-lock brakes run/start.
10A 1
17
Electric power steering run/start.
10A 1
18
Upfitter 5 relay (Raptor).
5A 1
19
Blower motor.
40A 2
20
Passenger seat motors.
30A 2
21
Radio amplifier.
20A 1
22
336
F-150 (TFC) Canada/United States of America, enUSA, Edition date: 201709, Fifth-Printing Fuses

Protected Components
Fuse Rating
Fuse Number
Trailer tow lamps module.
20A 2
43
Not used.
—
45
Steering-column lock.
10A 1
46
Powertrain control heater 3 (Diesel).
50A 2
47
Fuel filter heater (Diesel).
30A 2
48
Not used.
—
49
Fuel pump.
30A 2
50
Power point 3.
20A 2
51
Powertrain control heater 2 (Diesel).
50A 2
52
Trailer tow park lamps.
25A 2
53
Not used.
—
54
Upfitter 2 relay (Raptor).
15A 2
55
Not used.
—
56
USB smart charger.
5A 1
58
Not used.
—
59
Not used.
—
60
Not used (spare).
15A 1
61
Upfitter 6 relay (Raptor).
5A 1
62
4x4.
25A 1
63
E-locker.
15A 1
64
Not used.
—
65
Not used.
—
66
Not used.
—
67
338
F-150 (TFC) Canada/United States of America, enUSA, Edition date: 201709, Fifth-Printing Fuses

Protected Components
Fuse Rating
Fuse Number
Not used.
—
69
Anti-lock brake system (ABS) valves.
40A 2
70
Electric parking brake.
4x4.
25A 2
71
Not used.
—
72
Not used.
—
73
Trailer tow backup lamps.
10A 1
74
Not used.
—
75
Body control module 2.
40A 2
76
Climate controlled seat.
30A 2
77
Spot light module.
10A 1
78
Not used.
—
79
Heated windshield wiper.
10A 1
80
Upfitter 4 relay (Raptor).
Not used.
—
81
Transmission fluid pump.
30A 1
82
Powertrain control module (Diesel).
5A 1
Transmission control module.
15A 1
83
Not used.
—
84
Not used.
—
85
Not used.
—
86
Not used.
—
87
Multi-Contour Seats Relay.
10A 1
88
Upfitter 3 relay (Raptor).
Power running boards.
30A 2
89
339
F-150 (TFC) Canada/United States of America, enUSA, Edition date: 201709, Fifth-Printing Fuses

Protected Components
Fuse Rating
Fuse Number
Not used.
—
91
Heated mirrors.
15A 1
93
Rear heated seat module (Raptor, Diesel).
15A 1
94
Not used (spare).
15A 1
95
Not used.
—
96
Electric fan (Raptor).
40A 2
97
Powertrain control heater 1 (Diesel).
50A 2
10R transmission module r/s.
15A 2
98
3.3L transmission fluid pump.
Heated rear window.
40A 2
99
Diesel exhaust fluid (DEF) heater relay
(Diesel).
25A 2
100
Electric fan (Base only).
25A 2
101
Power sliding back window.
30A 2
102
Trailer tow stop-turn relay fuse.
20A 2
103
Snowplow switch.
15A 1
104
Rear heated seats (Base).
Telescoping mirror.
10A 1
105
1 Micro fuse.
2 Slotted M case fuse. Protected Components
Fuse Rating
Relay Number
Powertrain control module relay.
—
R02
Electric fan relay.
—
R05
340
F-150 (TFC) Canada/United States of America, enUSA, Edition date: 201709, Fifth-Printing Fuses

Protected Components
Fuse Rating
Fuse Number
Not used (spare).
20A
28
Not used (spare).
30A
29
Not used (spare).
30A
30
Adjustable pedal switch and motor.
15A
31
Multi-function display.
10A
32
SYNC.
Radio frequency receiver.
Radio.
20A
33
Run-start relay.
30A
34
Selectable drive mode switch.
5A
35
Upfitter switches (Raptor only).
360 camera module.
15A
36
Heated steering wheel module.
Rear-view mirror.
Rear heated seats.
Lane departure warning module.
Automatic high beam module.
Image processing module A.
Not used (spare).
20A
37
Rear window switches and motors.
30A Circuit breaker
38
CHANGING A FUSE
Fuses WARNING: Always replace a fuse
with one that has the specified
amperage rating. Using a fuse with a
higher amperage rating can cause severe
wire damage and could start a fire. If electrical components in the vehicle are
not working, a fuse may have blown. Blown
fuses are identified by a broken wire within
the fuse. Check the appropriate fuses
before replacing any electrical
components.
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F-150 (TFC) Canada/United States of America, enUSA, Edition date: 201709, Fifth-Printing FusesE217331