2015 FORD F450 relay

TOWING A TRAILER
WARNINGS
Do not exceed the GVWR or
the GAWR specified on the
certification label. Towing trailers beyond the
maximum recommended
gross trailer weight exceeds the
limit of the vehicle and could
result in engine damage,
transmission damage, structural
damage, loss of vehicle control,
vehicle rollover and personal
injury. Your vehicle may have electrical
items, such as fuses or relays,
related to towing. See the Fuses
chapter.
Your vehicle's load capacity
designation is by weight, not by
volume, so you cannot necessarily
use all available space when
loading a vehicle.
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. Load Placement
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.
• Select a tow bar 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.
When driving with a trailer or
payload, a slight takeoff vibration
or shudder may be present due to
the increased payload weight.
Additional information regarding
proper trailer loading and setting
your vehicle up for towing is
located in another chapter of this
manual. See
Load Limit (page
180).
You can also find information in
the
RV & Trailer Towing Guide
available at your authorized
dealer, or online.
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FUSE SPECIFICATION CHART
Power Distribution Box
WARNINGS
Always disconnect the battery before
servicing high current fuses.
To reduce risk of electrical shock,
always replace the cover to the
power distribution box before
reconnecting the battery or refilling fluid
reservoirs. The power distribution box is located in
the engine compartment. It has
high-current fuses that protect your
vehicle's main electrical systems from
overloads.
If you disconnect and reconnect the
battery, you will need to reset some
features. See Changing the 12V Battery
(page 244).
Protected components
Fuse amp rating
Fuse or relay number
Blower motor
Relay
1
Not used
—
2
Urea heaters (diesel engine)
Relay
3
Not used
—
4
Heated mirrors
Relay
5
Rear window defroster
Not used
—
6
Heated mirrors
50A*
7
Rear window defroster
Passenger seat
30A*
8
Driver seat
30A*
9
Trailer tow
40A*
10
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Protected components
Fuse amp rating
Fuse or relay number
Not used
—
11
Driver smart window motor
30A*
12
Not used
—
13
Not used
—
14
Fuel pump (diesel engine)
Diode
15
Not used
—
16
Heated mirror
15A**
17
Not used
—
18
Not used
—
19
Not used
—
20
Not used
—
21
Trailer tow electric brake
30A*
22
Blower motor
40A*
23
Not used
—
24
Wipers
30A*
25
Trailer tow park lamps
30A*
26
Urea heaters (diesel engine)
25A*
27
Buss bar
—
28
Trailer tow park lamps
Relay
29
A/C clutch
Relay
30
Wipers
Relay
31
Not used
—
32
Vehicle power 1
15A**
33
Vehicle power 2 (diesel engine)
15A**
34
Vehicle power 2 (gas engine)
20A**
Vehicle power 3
10A**
35
Vehicle power 4 (diesel engine)
15A**
36
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Protected components
Fuse amp rating
Fuse or relay number
Vehicle power 4 (gas engine)
20A**
Vehicle power 5 (diesel engine)
10A**
37
Electronic control module (diesel engine)
Relay
38
Powertrain control module (gas engine)
4x4 hub lock
10A**
39
4x4 electronic lock
15A**
40
Not used
—
41
Rear heated seats
20A**
42
Not used
—
43
Not used
—
44
Run/start relay coil
10A**
45
Transmission control module keep-alive
power (diesel engine)
10A**
46
A/C clutch feed
10A**
47
Run/start
Relay
48
Rearview camera system
10A**
49
Blower motor relay coil
10A**
50
Not used
—
51
Electronic control module
10A**
52
Powertrain control module,
Transmission control module run/start
4x4 module
10A**
53
Anti-lock brake system run/start
10A**
54
Rear window defroster coil
10A**
55
Passenger compartment fuse panel run/
start feed
20A**
56
Fuel pump
Relay
57
Not used
—
58
Not used
—
59
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Protected components
Fuse amp rating
Fuse or relay number
Not used
—
60
Not used
—
61
Not used
—
62
Not used
—
63
Not used
—
64
Not used
—
65
Fuel pump
20A**
66
Not used
—
67
Fuel pump relay coil
10A**
68
Not used
—
69
Trailer tow backup lamp
10A**
70
Canister vent (gas engine)
10A**
71
Electronic control module relay coil feed
keep-alive power
10A**
72
Powertrain control module
Not used
—
73
Not used
—
74
Not used
—
75
Trailer tow backup lamp
Relay
76
Not used
—
77
Not used
—
78
Not used
—
79
Not used
—
80
Not used
—
81
Auxiliary power point #2
20A*
82
Auxiliary power point #1
20A*
83
4x4 shift motor
30A*
84
Heated/cooled seats
30A*
85
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Protected components
Fuse amp rating
Fuse or relay number
Anti-lock brake system coil feed
25A*
86
Auxiliary power point #5
20A*
87
Auxiliary power point #6
20A*
88
Starter motor
40A*
89
Trailer tow battery charge
25A*
90
Not used
—
91
Auxiliary power point #4
20A*
92
Auxiliary power point #3
20A*
93
Auxiliary switch #1
25A*
94
Auxiliary switch #2
25A*
95
Anti-lock brake system pump
50A*
96
Inverter
40A*
97
Not used
—
98
Instrument panel power inverter
40A*
99
Not used
—
100
Starter
Relay
101
Not used
—
102
Not used
—
103
Not used
—
104
Not used
—
105
Not used
—
106
Not used
—
107
*Cartridge fuses
**Mini fuses
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Super Duty (), enUSA Fuses

Passenger Compartment Fuse
Panel
The fuse panel is in the passenger footwell.
Remove the panel cover to access the
fuses.
Pull the fuse panel cover toward you to
remove it. When the clips of the panel
disengage, let the panel fall easily.
Use the provided fuse puller tool to remove
a fuse. It is on the fuse panel cover. Protected components
Fuse amp rating
Fuse or relay number
Not used (spare)
30A
1
Auxiliary switch relay #4
15A
2
Passenger smart window motor
30A
3
Hood lamp
10A
4
Interior lights
Moonroof
20A
5
Driver seat module
5A
6
Driver lumbar motor
7.5A
7
Driver seat switch
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Protected components
Fuse amp rating
Fuse or relay number
Power mirror switch
10A
8
Auxiliary switch relay #3
10A
9
Customer access feed
10A
10
Run/accessory relay
Instrument cluster
10A
11
Interior lighting
15A
12
Lighted running board lamps
Right turn signals and brake lamps
15A
13
Left turn signals and brake lamps
15A
14
Backup lamps, Trailer tow backup relay
15A
15
High-mounted stop lamps
Reverse signal interior mirror
Right low beam headlamp
10A
16
Left low beam headlamp
10A
17
Brake shift interlock
10A
18
Keypad illumination
Passive anti-theft transceiver
Powertrain control module
Amplifier
20A
19
Subwoofer
Power door locks
20A
20
Brake on/off switch
10A
21
Horn
20A
22
Not used (spare)
15A
23
Diagnostic connector
15A
24
Electronic finish panel
Power fold mirror relay
Remote keyless entry
Steering wheel control module
Not used (spare)
15A
25
Steering wheel control module
5A
26
Not used (spare)
20A
27
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