2018 FORD E-350 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 your 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, for example fuses or relays,
related to towing. See Fuses
(page 129).
Your vehicle's load capacity
designation is by weight, not by
volume, so you cannot necessarily
use all available space when
loading your 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 draw 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
correct trailer loading and setting
your vehicle up for towing is
located in another chapter of this
Owner's Manual. See
Load Limit
(page 97). You can also find the
information in the RV & Trailer
Towing Guide. See an authorized
dealer.
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E-Series (TE4) Canada/United States of America, enUSA, Edition date: 201712, Second Printing Towing

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. Note:
If your vehicle is equipped with dual
batteries, disconnecting the primary
under-hood battery does not remove power
from all circuits.
The power distribution box is in the engine
compartment. It has high-current fuses
that protect your vehicle's main electrical
systems from overloads.
If the battery has been disconnected and
reconnected, you will need to reset some
features. See Changing the 12V Battery
(page 151). Protected Components
Fuse Rating
Fuse or Relay
Number
Powertrain control module relay.
—
1
Starter solenoid relay.
—
2
Wiper relay.
—
3
Trailer tow battery charge relay.
—
4
Fuel pump relay.
—
5
Trailer tow park lamp relay.
—
6
129
E-Series (TE4) Canada/United States of America, enUSA, Edition date: 201712, Second Printing FusesE194305

Protected Components
Fuse Rating
Fuse or Relay
Number
Auxiliary switch #4 relay.
—
7
Auxiliary switch #3 relay.
—
8
Modified vehicle and stripped chassis run/
start relay.
—
9
Cooling fan relay (6.2L engine).
—
10
Cooling fan (6.2L engine).
50A 1
11
Modified vehicle and stripped chassis run/
start.
40A 2
12
Starter solenoid relay.
30A 2
13
Run/start relay.
40A 2
14
Modified vehicle and stripped chassis
battery.
40A 2
15
Auxiliary air conditioning blower.
50A 2
16
Trailer tow battery charge.
50A 2
17
Trailer tow park feed.
Electric trailer brake.
30A 2
18
Trailer brake controller.
Auxiliary switch #1.
30A 2
19
Auxiliary switch #2.
30A 2
20
Fuel pump (6.2L).
20A 2
21
Not used.
—
22
Air conditioning clutch relay.
—
23
Horn relay (stripped chassis).
—
24
Run/start relay.
—
25
Not used.
—
26
Not used.
—
27
130
E-Series (TE4) Canada/United States of America, enUSA, Edition date: 201712, Second Printing Fuses

Protected Components
Fuse Rating
Fuse or Relay
Number
Back-up lamp.
20A 3
28
Air conditioning clutch.
10A 3
29
Brake on/off switch.
10A 3
30
Cluster battery (stripped chassis).
10A 3
31
Blower motor.
50A 2
32
Anti-lock brake system pump.
40A 2
33
Stripped chassis horn.
20A 2
34
Powertrain control module relay.
40A 2
35
Ignition switch (stripped chassis).
20A 2
36
Trailer tow left-hand side stop lamp and
direction indicator lamp relay.
—
37
Trailer tow right-hand side stop lamp and
direction indicator lamp relay.
—
38
Back-up lamp relay.
—
39
Blower motor relay.
—
40
Not used.
—
41
Diagnostic connector (stripped chassis).
15A 3
42
Fuel pump (6.8L).
20A 3
43
Auxiliary switch #3.
10A 3
44
Auxiliary switch #4.
15A 3
45
Powertrain control module keep alive
memory power.
10A 3
46
Canister vent control valve.
Powertrain control module relay coil.
Anti-lock brake system relay coil.
40A 2
47
131
E-Series (TE4) Canada/United States of America, enUSA, Edition date: 201712, Second Printing Fuses

Protected Components
Fuse Rating
Fuse or Relay
Number
Trailer tow stop lamp and direction indic-
ator lamps.
20A 2
48
Wiper motor.
30A 2
49
Not used.
—
50
Cutaway.
20A 2
51
Modified vehicle and stripped chassis run/
start relay coil.
10A 3
52
Anti-lock brake system run/start feed.
10A 3
53
Fuel pump relay coil.
10A 3
54
Not used.
—
55
Not used.
—
56
Trailer tow park lamp.
20A 3
57
Trailer tow back-up lamp.
15A 3
58
Not used.
—
59
Not used.
—
60
Not used.
—
61
Auxiliary switch #2 relay.
—
62
Trailer tow battery charge.
30A 2
63
Not used.
—
64
Power point 2 (glove box).
20A 2
65
Power point 3 (cutaway B+).
20A 2
66
Power point 1 (instrument panel).
20A 2
67
Modified vehicle.
50A 2
68
Not used.
—
69
132
E-Series (TE4) Canada/United States of America, enUSA, Edition date: 201712, Second Printing Fuses

Protected Components
Fuse Rating
Fuse or Relay
Number
Stripped chassis.
30A 2
70
Not used.
—
71
Cigarette lighter/power point.
20A 2
72
Not used.
—
73
Power seat.
30A 2
74
Vehicle power 1.
20A 3
75
Powertrain control module power.
Vehicle power 2.
20A 3
76
Powertrain control module emissions
related components.
Vehicle power 3.
10A 3
77
Powertrain control module general
components.
Vehicle power 4.
15A 3
78
Engine ignition coil relay coil.
Vehicle power 5.
10A 3
79
Transmission.
Cluster run/start (stripped chassis).
10A 3
80
Not used.
—
81
Not used.
—
82
Fuel pump diode.
—
83
Not used.
—
84
Auxiliary switch #1 relay.
—
85
1 Cartridge fuse
2 A1S fuse
3 Mini fuse
133
E-Series (TE4) Canada/United States of America, enUSA, Edition date: 201712, Second Printing Fuses

Protected Components
Fuse Rating
Fuse or Relay
Number
Inverter B+.
30A
1
Not used (spare).
15A
2
Not used (spare).
15A
3
Not used (spare).
30A
4
Passenger compartment fuse panel.
10A
5
Brake-shift interlock.
Direction indicators lamps.
20A
6
Hazard lamps.
Stop lamps.
Left-side headlamp low beam.
10A
7
Right-side headlamp low beam.
10A
8
Courtesy lamps.
15A
9
Switch illumination.
15A
10
Not used (spare).
10A
11
Not used (spare).
7.5A
12
Mirrors.
5A
13
SYNC
10A
14
Global positioning system module.
Not used (spare).
10A
15
Not used (spare).
15A
16
Door locks.
20A
17
Not used (spare).
20A
18
Not used (spare).
25A
19
Diagnostic connector (except stripped
chassis).
15A
20
Not used (spare).
15A
21
Parking lamps.
15A
22
License plate lamps.
135
E-Series (TE4) Canada/United States of America, enUSA, Edition date: 201712, Second Printing Fuses

Protected Components
Fuse Rating
Fuse or Relay
Number
Headlamp high beams.
15A
23
Horn (except stripped chassis).
20A
24
Demand lighting.
10A
25
Cluster (except stripped chassis).
10A
26
Ignition switch feed.
20A
27
Audio mute (start).
5A
28
Cluster (except stripped chassis).
5A
29
Not used (spare).
5A
30
Not used (spare).
10A
31
Restraints module.
10A
32
Trailer brake controller.
10A
33
Not used (spare).
5A
34
Cutaway run/start.
10A
35
Passive anti-theft system radio frequency
module.
5A
36
Climate control.
10A
37
Stripped chassis #1 run/start.
Not used (spare).
20A
38
Radio.
20A
39
Not used (spare).
20A
40
Radio.
15A
41
Switch illumination.
Automatic dimming rear view mirror.
Power inverter.
Auxiliary switch.
10A
42
Stripped chassis instrument panel
connector #1.
10A
43
Trailer tow battery charge relay.
10A
44
Wipers.
5A
45
136
E-Series (TE4) Canada/United States of America, enUSA, Edition date: 201712, Second Printing Fuses