2021 Ford F-250 fuse box diagram - StartMyCar (2024)

This F-250 has 2 different fuse boxes:

Engine Compartment Fuse Box diagramPassenger Compartment Fuse Panel diagram
TypeNo.Description

Fuse FMM/MCase

20A
1

Power point 4.

Fuse FMM/MCase

20A
2

Power point 3.

Fuse MICRO2

10A
3

Spot light module.

Fuse MICRO2

10A
4

Four-wheel drive vacuum solenoid.

Fuse FMX/JCase

40A
5

Active front steering.

Fuse MICRO2

10A
6

Snow plow.

Fuse FMM/MCase

30A
7

Trailer tow battery charge.

Fuse MICRO2

10A
8

Anti-lock brake system module.

Fuse MICRO2

10A
9

Electronic power assisted steering module.

Fuse MICRO2

30A
10

Trailer tow park lamps.

Fuse MICRO2

20A
11

Horn.

Fuse FMM/MCase

30A
12

Torque overlay.

Fuse FMM/MCase

30A
13

Power sliding rear window.

Fuse FMX/JCase

40A
14

Body control module - battery power in feed 1.

Fuse FMM/MCase

30A
15

Passenger seat power.

Fuse MICRO2

10A
16

Powertrain control module. Transmission control module.

Fuse MICRO2

10A
17

Blind spot information system.

Fuse MICRO2

10A
18

Four-wheel drive module.

Fuse MICRO2

5A
19

Adaptive cruise control.

Fuse MICRO2

15A
20

Heated mirrors.

Fuse FMM/MCase

40A
21

Heated rear window.

Fuse MICRO2

10A
22

On-board diagnostic module. Smart data link connector.

Fuse MICRO2

15A
23

Transmission control module.

Fuse FMM/MCase

30A
24

Driver power seat.

Fuse MICRO2

25A
25

Voltage quality module.

Fuse FMM/MCase

30A
26

Trailer tow battery charge.

Fuse MICRO2

20A
27

Rear heated seats.

Fuse FMM/MCase

25A
28

Glow plug [Diesel].

Fuse FMM/MCase

40A
29

Electric power assisted steering motor.

Fuse MICRO2

10A
30

Not used (spare).

Fuse MICRO2

20A
31

Power point 5.

Fuse FMM/MCase

25A
32

Four-wheel drive module.

Fuse MICRO2

10A
33

Alternator sense line 2.

Fuse FMX/JCase

50A
34

Electric cooling fan [Gas]. Supplemental air heater [Diesel].

Fuse FMM/MCase

20A
35

Power point 2.

Fuse FMM/MCase

20A
36

Power point 1.

Fuse FMX/JCase

60A
37

Anti-lock brake system pump.

Fuse FMX/JCase

60A
38

Inverter.

Fuse MICRO2

25A
39

Four-wheel drive module.

Fuse FMM/MCase

30A
40

Starter motor solenoid.

Fuse MICRO2

10A
41

Tailgate release solenoid.

Fuse FMX/JCase

40A
42

Blower motor.

Fuse MICRO2

10A
43

Trailer tow backup lamps.

Fuse FMM/MCase

40A
44

Trailer tow lighting module.

Fuse FMM/MCase

30A
45

Anti-lock brake system valve.

Fuse FMM/MCase

30A
46

Compressed natural gas module power.

Fuse FMX/JCase

50A
47

Supplemental air heater [Diesel].

Fuse FMX/JCase

50A
48

Supplemental air heater [Diesel].

Fuse FMM/MCase

30A
50

Heated and cooled seats.

Fuse MICRO2

20A
51

Powertrain control module.

Fuse MICRO2

15A
52

Compressed natural gas [Gas]. Fuel rail pressure relief control [Diesel].

Fuse MICRO2

20A
53

Exhaust gas recirculation stepper motor [Gas]. Universal exhaust gas oxygen sensors [Gas]. Exhaust gas recirculation cooler bypass [Diesel]. Urea pump motor controller [Diesel]. Oxygen sensors.

Fuse MICRO2

20A
54

A/C clutch relay power. Fan clutch.

Fuse MICRO2

5A
55

Rain sensor.

Fuse FMM/MCase

30A
56

Windshield wipers.

Fuse MICRO2

10A
57

Upfitter interface module.

Fuse MICRO2

10A
58

Alternator sense line.

Fuse MICRO2

30A
59

Power running boards.

Fuse FMX/JCase

40A
60

Body control module - battery power in feed 2.

Fuse MICRO2

10A
61

Telescopic mirror motors.

Fuse FMM/MCase

40A
62

Trailer brake control. Aftermarket e-brake access.

Fuse MICRO2

15A
63

Multi-contour seats.

Fuse MICRO2

20A
64

Ignition coil [Gas]. Glow plug module [Diesel]. Nitrogen oxide module [Diesel]. Urea level and quality sensor [Diesel].

Fuse FMM/MCase

30A
65

Fuel pump.

Fuse MICRO2

10A
66

A/C clutch solenoid.

Fuse FMM/MCase

40A
67

Auxiliary lighting module.

Fuse MICRO2

10A
68

Powertrain control module.

Fuse FMX/JCase

60A
69

Body control module power.

Fuse MICRO2

30A
70

Trailer tow stop and turn lamps.

TypeNo.Description

Fuse MICRO2

10A
2

Driver door pack switch. Power sliding rear window switch.

Fuse MICRO2

7.5A
3

Seat memory switch. Power lumbar motor. Wireless charging module.

Fuse MICRO2

20A
4

Not used (spare).

Fuse MICRO3

10A
6

Power telescoping mirrors switch. Front power windows switch.

Fuse MICRO3

10A
7

Brake on-off switch.

Fuse MICRO3

5A
8

Embedded modem.

Fuse MICRO3

5A
9

Combined sensor module.

Fuse MICRO3

7.5A
12

On-board diagnostic module. Smart data link connector. Climate control module.

Fuse MICRO3

7.5A
13

Steering column control module. Instrument cluster.

Fuse MICRO3

15A
14

Not used.

Fuse MICRO3

15A
15

SYNC. Display.

Fuse MICRO3

7.5A
17

Active front steering module. Park aid module.

Fuse MICRO3

7.5A
18

Selectable drive modes switch. Select shift switch.

Fuse MICRO3

5A
19

Head up display.

Fuse MICRO3

5A
20

Ignition switch. Key inhibit solenoid.

Fuse MICRO3

5A
21

Head up display. In-vehicle temperature and humidity sensor.

Fuse MICRO3

5A
22

Upfitter switches.

Fuse MICRO2

30A
23

Driver front door module.

Fuse MICRO2

30A
24

Moonroof.

Fuse MICRO2

20A
25

Not used (spare).

Fuse MICRO2

30A
26

Passenger front door module.

Fuse MICRO2

30A
27

Not used (spare).

Fuse MICRO2

30A
28

Amplifier.

Fuse MICRO2

15A
29

Adjustable pedals switch.

Fuse MICRO2

5A
30

Brake on-off output to trailer brake controller and customer access circuits.

Fuse MICRO2

10A
31

Remote keyless entry.

Fuse MICRO2

20A
32

Radio.

Fuse MICRO2

30A
34

Run/start relay.

Fuse MICRO2

5A
35

Not used (spare).

Fuse MICRO2

15A
36

Camera module. Lane keeping system. Auto-dimming interior mirror. Rear heated seats.

Fuse MICRO2

20A
37

Heated steering wheel.

Circuit breaker MAXI

38

Power windows.

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Source: Ford F-250 2021 Owner's Manual

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2021  Ford F-250 fuse box diagram - StartMyCar (2024)
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