2021 FORD F-450 fuse

Protected Component
Fuse
Rating
Fuse
Number
Trailer tow battery charge.
30 A
26
Rear heated seats.
20 A
27
Glow plug (diesel).
25 A
28
Not used (gas).
—
Electric power assisted steering motor.
40 A
29
Not used (spare).
10 A
30
Power point 5.
20 A
31
Four-wheel drive module.
25 A
32
Alternator sense line 2.
10 A
33
Electric cooling fan (gas).
50 A
34
Supplemental air heater (diesel).
Power point 2.
20 A
35
Power point 1.
20 A
36
Anti-lock brake system pump.
60 A
37
Inverter.
60 A
38
Four-wheel drive module.
25 A
39
Starter motor solenoid.
30 A
40
Tailgate release solenoid.
10 A
41
Blower motor.
40 A
42
Trailer tow backup lamps.
10 A
43
Trailer tow lighting module.
40 A
44
Anti-lock brake system valve.
30 A
45
Compressed natural gas module power.
30 A
46
Supplemental air heater (diesel).
50 A
47
Not used (gas).
—
Supplemental air heater (diesel).
50 A
48
Not used (gas).
—
341
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Fuses

Protected Component
Fuse
Rating
Fuse
Number
Not used.
—
49
Heated and cooled seats.
30 A
50
Powertrain control module.
20 A
51
Compressed natural gas (gas).
15 A
52
Fuel rail pressure relief control (diesel).
Exhaust gas recirculation stepper motor (gas).
20 A
53
Universal exhaust gas oxygen sensors (gas).
Exhaust gas recirculation cooler bypass (diesel).
Urea pump motor controller (diesel).
Oxygen sensors.
A/C clutch relay power.
20 A
54
Fan clutch.
Rain sensor.
5 A
55
Windshield wipers.
30 A
56
Upfitter interface module.
10 A
57
Alternator sense line.
10 A
58
Power running boards.
30 A
59
Body control module - battery power in feed 2.
40 A
60
Telescopic mirror motors.
10 A
61
Trailer brake control.
40 A
62
Aftermarket e-brake access.
Multi-contour seats.
15 A
63
Ignition coil (gas).
20 A
64
Glow plug module (diesel).
Nitrogen oxide module (diesel).
Urea level and quality sensor (diesel).
Fuel pump.
30 A
65
A/C clutch solenoid.
10 A
66
Auxiliary lighting module.
40 A
67
Powertrain control module.
10 A
68
342
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Fuses

Protected Component
Fuse
Rating
Fuse
Number
Body control module power.
60 A
69
Trailer tow stop and turn lamps.
30 A
70
Note: Spare fuse amperage may vary.
Passenger Compartment Fuse
Panel
The fuse panel is in the right-hand side of
the passenger footwell behind a trim panel.
To remove the trim panel, pull it toward
you and swing it away from the side. To
reinstall it, line up the tabs with the grooves
on the panel, and then push it shut. Note:
It may be easier to access the fuse
panel if you remove the finish trim piece.
Replace fuses with the same type and
rating. See Changing a Fuse (page 346). Protected Component
Fuse
Rating
Fuse
Number
Not used.
—
1
Driver door pack switch.
10 A
2
Power sliding rear window switch.
Seat memory switch.
7.5 A
3
343
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- FusesE145984

Protected Component
Fuse
Rating
Fuse
Number
Power lumbar motor.
Wireless charging module.
Not used (spare).
20 A
4
Not used.
—
5
Power telescoping mirrors switch.
10 A
6
Front power windows switch.
Brake on-off switch.
10 A
7
Embedded modem.
5 A
8
Combined sensor module.
5 A
9
Not used.
—
10
Not used.
—
11
On-board diagnostic module.
7.5 A
12
Smart data link connector.
Climate control module.
Steering column control module.
7.5 A
13
Instrument cluster.
Not used.
15 A
14
SYNC.
15 A
15
Display.
Not used.
—
16
Active front steering module.
7.5 A
17
Park aid module.
Selectable drive modes switch.
7.5 A
18
Select shift switch.
Head up display.
5 A
19
Ignition switch.
5 A
20
Key inhibit solenoid.
Head up display.
5 A
21
In-vehicle temperature and humidity sensor.
Upfitter switches.
5 A
22
344
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Fuses

Protected Component
Fuse
Rating
Fuse
Number
Driver front door module.
30 A
23
Moonroof.
30 A
24
Not used (spare).
20 A
25
Passenger front door module.
30 A
26
Not used (spare).
30 A
27
Amplifier.
30 A
28
Adjustable pedals switch.
15 A
29
Brake on-off output to trailer brake controller and customer access
circuits.
5 A
30
Remote keyless entry.
10 A
31
Radio.
20 A
32
Not used.
—
33
Run/start relay.
30 A
34
Not used (spare).
5 A
35
Camera module.
15 A
36
Lane keeping system.
Auto-dimming interior mirror.
Rear heated seats.
Heated steering wheel.
20 A
37
Power windows.
30 A
Circuit
Breaker
38
Note: Spare fuse amperage may vary.
345
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-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 Fuse Type
Callout
Micro 2
A
Micro 3
B
Maxi
C
Mini
D
346
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- FusesE217331 E207206

Fuse Type
Callout
M Case
E
J Case
F
J Case Low Profile
G
347
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Fuses

3. Raise the hood until the lift cylinders
hold it open.
4. To close, lower the hood and make sure that it is closed properly and fully
latched.
UNDER HOOD OVERVIEW - 6.2L Battery. See Changing the 12V Battery (page 379).
A
Engine compartment fuse box. See
Fuse Specification Chart (page 339).
B
Engine oil dipstick. See
Engine Oil Dipstick (page 352).
C
349
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- MaintenanceE190266 E330427