2023 FORD F650/750 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 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 Fuses
(page 200).
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.
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
175).
You can also find information in
the RV & Trailer Towing Guide
available at your authorized
dealer, or online.
RV & Trailer Towing Guide Online
http://www.fleet.ford.com/towing-guides/ Website
178
Towing

Protected Component Rating Item
Blower motor control.
Upfitter - frame. 20 A 3
Starter motor. 30 A 4
Not used. — 5
Upfitter relay 4. 20 A 6
Not used. — 8
Not used. — 10
Not used. — 12
Run/start spare. 10 A 13
Adaptive cruise control. 10 A 14
Blower motor relay. 10 A 15
Air dryer. 20 A 16
Powertrain control module
- ignition status run power. 10 A 17
Glow plug control module -
ignition status run power
(diesel).
Anti-lock brake system run/
start. 10 A 18
Transmission control
module. 10 A 19
Ignition status run power
(diesel).
Windshield wiper motor. 30 A 20
Not used. — 21
Not used. — 22
Alternator 2 (dual alternator
only). 10 A 23
Body control module run
power 2 bus. 40 A 24
201
Fuses

Protected Component Rating Item
Body control module run
power 1 bus. 50 A 25
Not used. — 26
Upfitter battery feed. 20 A 27
Not used. — 28
Alternator 1 A-Line. 10 A 29
Not used. — 30
Hydromax pump. 60 A 31
Powertrain control module. 20 A 32
Canister vent solenoid (gas). 20 A 33
Canister purge solenoid
(gas).
Variable cam timing actu-
ator 11 (gas).
Heated exhaust gas oxygen
sensor (gas).
Urea tank power (diesel).
Exhaust gas recirculation
cool bypass valve (diesel).
A/C clutch relay. 10 A 34
Customer access vehicle
power 3 feed.
Variable oil pump (diesel).
Cooling fan (diesel).
Fan clutch (gas).
Exhaust brake switch.
Variable oil pressure control
(gas)
Coil on plug (gas) 20 A 35
Urea tank (diesel).
Glow plug controller
(diesel).
Nitrogen oxide sensor
control module (diesel).
Particulate matter sensor
(diesel).
Fuel volume control value
(diesel). 10 A 36
202
Fuses

Protected Component Rating Item
Fuel pressure regulator
(diesel).
Not used. — 37
Not used. — 38
Not used. — 39
Trailer brake control
module. 30 A 41
Upfitter spare. 30 A 43
Not used. — 45
A/C clutch solenoid. 10 A 46
Upfitter relay 1. 40 A 47
Upfitter run and accessory
feed. 20 A 48
Pump electronics module
(gas). 30 A 49
Fuel pump (diesel).
Injector power (gas). 15 A 50
Power point #1. 20 A 51
Not used. — 52
Trailer tow park lamp. 30 A 53
Not used. — 54
Upfitter relay 3. 20 A 55
Not used. — 56
USB power. 5 A 58
U-Haul park lamps. 10 A 59
Dual fuel tank selector
switch (diesel). 10 A 60
Not used. — 61
Not used. — 62
203
Fuses

Protected Component Rating Item
Driver seat compressor. 20 A 63
Passenger seat compressor. 20 A 64
Upfitter - run activate feed. 10 A 65
Four pack solenoid differen-
tial lock. 10 A 66
Hydromax relay power. 10 A 67
Not used. — 69
Inverter. 40 A 70
Anti-lock brake system
valves. 30 A 71
Brake on-off switch
(hydraulic brakes). 10 A 72
Stoplamp air pressure
switch 1 and 2 (air brakes).
Not used. — 73
Heated mirror. 15 A 74
Not used. — 75
Body control module battery
feed. 60 A 76
Body control module
voltage quality monitor
power feed. 30 A 77
Transmission module
(diesel). 10 A 78
Hydromax pump monitor. 5 A 79
Trailer tow backup signal. 10 A 80
Not used. — 81
Upfitter switch (factory
location for ignition power). 5 A 82
Upfitter switch (optional
location for power at all
times). 5 A 83
204
Fuses

Protected Component Rating Item
Not used. — 84
Not used. — 85
Not used. — 86
Not used. — 87
Cargo lamps. 10 A 88
Not used. — 89
Upfitter - B-pillar. 40 A 91
Not used. — 93
Not used. — 94
Stoplamps. 20 A 95
Trailer tow stoplamps.
Not used. — 96
Not used. — 97
Trailer tow battery charge. 30 A 98
Upfitter relay 2. 40 A 99
Glow plug controller
(diesel). 25 A 100
Not used. — 101
Not used. — 102
Not used. — 103
Not used. — 104
Trailer tow stoplamp and
turn relay. 15 A 105
Note:Spare fuse amperage may vary.
Passenger Compartment Fuse Box
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.
205
Fuses

Protected Component Rating Item
Not used. — 8
Not used. — 9
Not used. — 10
Not used. — 11
Smart data link connector. 7.5 A 12
Cluster. 7.5 A 13
Steering column control
module.
Not used. — 14
Climate control module. 15 A 15
Not used. — 16
Not used. — 17
Yaw sensor. 7.5 A 18
Electronic stability control
and non-electric stability
control.
Telematics control unit
module. 5 A 19
Ignition switch. 5 A 20
Not used. — 21
Not used. — 22
Left-hand front window
motor. 30 A 23
Not used. — 24
Not used. — 25
Right-hand front motor
window. 30 A 26
Not used. — 27
Not used. — 28
Relay folding mirror. 15 A 29
207
Fuses

Protected Component Rating Item
Brake signal for air brake. 5 A 30
Customer access stoplamp
signal.
Brake on-off isolation relay.
Trailer tow stoplamp relay.
Upfitter interface module. 10 A 31
Remote radio frequency
receiver.
Radio. 20 A 32
Not used. — 33
Not used. — 34
Tow haul switch. 5 A 35
Lane departure warning
camera. 15 A 36
Not used. — 37
Left-hand front power
window switch (four
window units). 30 A 38
Note:Spare fuse amperage may vary.
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.
E217331
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.
208
Fuses