2021 FORD F650/750 fuses

Protected Component
Fuse
Rating
Fuse
Number
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
Not used.
—
84
Not used.
—
85
Not used.
—
86
Not used.
—
87
Cargo lamps.
10 A
88
Not used.
—
89
Not used.
—
91
Not used.
—
93
Not used.
—
94
Stop lamps.
20 A
95
Trailer tow stop lamps.
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
197
F650750 (TBC) , enUSA, Edition date: 202010, Second-Printing Fuses

Protected Component
Fuse
Rating
Fuse
Number
Not used.
—
104
Trailer tow stop and turn relay.
15 A
105
Note: Spare fuse amperage may vary. Protected Component
Fuse
Rating
Relay
Number
Not used.
—
R02
Not used.
—
R05
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.
Replace fuses with the same type and
rating. See Changing a Fuse (page 201).
198
F650750 (TBC) , enUSA, Edition date: 202010, Second-Printing FusesE145984

Protected Component
Fuse Rating
Fuse Number
Not used.
—
1
Right-hand and left-hand front door lock
switch.
10 A
2
Telescopic mirror switch.
Right-hand and left-hand front window
switch (two window units).
Right-hand and left-hand front window
motor.
Inverter.
Power mirror switch.
7.5 A
3
Ancillary translator module.
20 A
4
Not used.
—
5
Not used.
—
6
Smart data link connector power.
10 A
7
Air brake diagnostic connector.
Not used.
—
8
Not used.
—
9
Not used.
—
10
Not used.
—
11
Smart data link connector.
7.5 A
12
Enterprise wired-in-device.
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.
Not used.
—
19
199
F650750 (TBC) , enUSA, Edition date: 202010, Second-Printing Fuses

Protected Component
Fuse Rating
Fuse Number
Ignition switch.
5 A
20
Exhaust brake switch.
5 A
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
Brake signal for air brake.
5 A
30
Customer access stop lamp signal.
Brake on-off isolation relay.
Trailer tow stop lamp 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.
200
F650750 (TBC) , enUSA, Edition date: 202010, Second-Printing Fuses

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.
Fuse Types Micro 2.
A
Micro 3.
B
Maxi.
C
Mini.
D
M Case.
E
J Case.
F
201
F650750 (TBC) , enUSA, Edition date: 202010, Second-Printing FusesE217331 E267379

J Case Low Profile.
G
Slotted M Case.
H
202
F650750 (TBC) , enUSA, Edition date: 202010, Second-Printing Fuses

Engine compartment (with engine off)
Inspect for glazing, fraying or cracking. There should be no
more than 5-7 cracks per rib, per 1 in (2.5 cm)
Belts (fan, alternator,
water pump and air
conditioning
compressor)
Inspect for signs of fluid puddles or dripping fluid on the
ground under the engine, or the underside of the engine.
Fluid leaks
Inspect for debris that may have collected on the HVAC air
inlet grille or inside the exterior module as this may reduce
system performance.
HVAC air inlet Engine starting (with parking brake applied)
Before entering the cab, verify that the vehicle is equipped
with spare electrical fuses (if used), three red reflective
triangles, a properly charged and rated fire extinguisher and
wheel chocks.
Safety and emergency
equipment
Walk around the vehicle and verify all steps and grab handles,
inside and out (as well as behind), are tight and clean. Use
extreme caution and a three-point stance at all times.
Inspect door latches for proper closing, latching and locking.
Set the parking brake. Make sure the gearshift lever is in
neutral (N) or park (P) (if equipped with a park position).
Starting the engine
Diesel engine:
Turn the key to the on position. Turn the key
to start when the wait to start indicator light in the instrument
cluster turns off.
Gasoline engine:
Turn the key to start, and then release it
as soon as the engine starts.
Verify pressure builds to normal operating range.
Engine oil pressure
A tone indicating low air pressure should sound immediately
after the engine starts but before the compressor has built-
up pressure. The tone should stop when the air pressure
reaches
70 psi (483 kPa). Let the air pressure build to
governed cutout pressure, which should occur between
115– 130 psi (793–896 kPa)
.
Low air pressure warning
tone (if equipped with an
air compressor)
Press the accelerator and verify that it operates smoothly,
without any binding or irregular feel. Release the pedal and
verify the engine returns to idle speed immediately.
Accelerator
204
F650750 (TBC) , enUSA, Edition date: 202010, Second-Printing Vehicle Inspection Guide

UNDER HOOD OVERVIEW - 6.7L DIESEL
Engine compartment fuse box. See Fuses (page 193).
A
Windshield washer fluid reservoir. See
Washer Fluid Check (page 242).
B
Automatic transmission fluid dipstick. See
Automatic Transmission Fluid
Check (page 236).
C
Secondary Cooling System Reservoir. See Engine Coolant Check (page 231).
D
Engine coolant reservoir.
See Engine Coolant Check (page 231).
E
Secondary fuel filter. See
Draining the Fuel Filter Water Trap (page 225).
F
Engine oil separator. See Changing the Engine Oil and Oil Filter (page 219).
G
Engine oil filler cap.
See Engine Oil Check (page 218).
H
Brake fluid reservoir.
See Brake Fluid Check (page 237).
I
Power steering fluid reservoir. See
Power Steering Fluid Check (page 238).
J
Air brake compressor. See
Brake System Inspection (page 248).
K
Engine oil dipstick.
See Engine Oil Dipstick (page 217).
L
Air cleaner assembly. See Changing the Engine Oil and Oil Filter (page 219).
M
215
F650750 (TBC) , enUSA, Edition date: 202010, Second-Printing MaintenanceE313700