2020 Ford F350 Fuse Box Diagram

In this article, we will discover the inner workings of the 2020 Ford F350 fuse box diagram, demystifying the purpose and functionality of the various fuses and relays that control the vehicle’s electrical operations. Whether you’re a seasoned mechanic or a curious F350 owner, this guide will equip you with the knowledge needed to navigate the electrical landscape of this impressive truck.

Identifying the Fuse Types

CALLOUT	FUSE TYPE
A	Micro 2
B	Micro 3
C	Maxi
D	Mini
E	M Case
F	J Case
G	J Case Low Profile

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.

2020 Ford F350 Engine Compartment Fuse Box Diagram

The fuse box located in the engine compartment is where you’ll find the high-current fuses. These fuses serve the important role of safeguarding the primary electrical systems of your vehicle by preventing overloads.

To access the engine compartment fuse box, you need to open the hood of your F350.

Fuse Number	Fuse Rating	Protected Component
1	20 A	Power point 4.
2	20 A	Power point 3.
3	10 A	Spot light module.
4	10 A	Four-wheel drive vacuum solenoid.
5	40 A	Active front steering.
6	10 A	Snow plow.
7	30 A	Trailer tow battery charge.
8	10 A	Anti-lock brake system module.
9	10 A	Electronic power assisted steering module.
10	30 A	Trailer tow park lamps.
11	20 A	Horn.
12	30 A	Torque overlay.
13	30 A	Power sliding rear window.
14	40 A	Body control module – battery power in feed 1.
15	30 A	Passenger seat power.
16	10 A	Powertrain control module.   Transmission control module.
17	10 A	Blind spot information system.
18	10 A	Four-wheel drive module.
19	5 A	Adaptive cruise control.
20	15 A	Heated mirrors.
21	40 A	Heated rear window.
22	10 A	On-board diagnostic module.   Smart data link connector.
23	15 A	Transmission control module.
24	30 A	Driver power seat.
25	25 A	Voltage quality module.
26	30 A	Trailer tow battery charge.
27	20 A	Rear heated seats.
28	25 A	Glow plug (diesel).
	—	Not used (gas).
29	40 A	Electric power assisted steering motor.
30	10 A	Heated wiper park.
31	20 A	Power point 5.
32	25 A	Four-wheel drive module.
33	10 A	Alternator sense line 2.
34	50 A	Electric cooling fan (gas).   Supplemental air heater (diesel).
35	20 A	Power point 2.
36	20 A	Power point 1.
37	60 A	Anti-lock brake system pump.
38	60 A	Inverter.
39	25 A	Four-wheel drive module.
40	30 A	Starter motor solenoid.
41	10 A	Tailgate release solenoid.
42	40 A	Blower motor.
43	10 A	Trailer tow backup lamps.
44	40 A	Trailer tow lighting module.
45	30 A	Anti-lock brake system valve.
46	30 A	Compressed natural gas module power.
47	50 A	Supplemental air heater (diesel).
	—	Not used (gas).
48	50 A	Supplemental air heater (diesel).
	—	Not used (gas).
49	—	Not used.
50	30 A	Heated and cooled seats.
51	20 A	Powertrain control module.
52	15 A	Compressed natural gas (gas).   Fuel rail pressure relief control (diesel).
53	20 A	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.
54	20 A	A/C clutch relay power.   Fan clutch.
55	5 A	Rain sensor.
56	30 A	Windshield wipers.
57	10 A	Upfitter interface module.
58	10 A	Alternator sense line.
59	30 A	Power running boards.
60	40 A	Body control module – battery power in feed 2.
61	10 A	Telescopic mirror motors.
62	40 A	Trailer brake control.   Aftermarket e-brake access.
63	15 A	Multi-contour seats.
64	20 A	Ignition coil (gas).   Glow plug module (diesel).   Nitrogen oxide module (diesel).   Urea level and quality sensor (diesel).
65	30 A	Fuel pump.
66	10 A	A/C clutch solenoid.
67	40 A	Auxiliary lighting module.
68	10 A	Powertrain control module.
69	60 A	Body control module power.
70	30 A	Trailer tow stop and turn lamps.

2020 Ford F350 Passenger Compartment Fuse Box Diagram

The fuse panel can be found on the right-hand side of the passenger footwell, concealed behind a trim panel. To access it, simply pull the trim panel towards you and swing it away from the side. When reinstalling the trim panel, make sure to align the tabs with the grooves on the panel, and then push it firmly until it clicks shut.

Fuse Number	Fuse Rating	Protected Component
1	—	Not used.
2	10 A	Driver door pack switch.   Power sliding rear window switch.
3	7.5 A	Seat memory switch.   Power lumbar motor.   Wireless charging module.
4	—	Not used.
5	—	Not used.
6	10 A	Power telescoping mirrors switch.   Front power windows switch.
7	10 A	Brake on-off switch.
8	5 A	Embedded modem.
9	5 A	Combined sensor module.
10	—	Not used.
11	—	Not used.
12	7.5 A	On-board diagnostic module.   Smart data link connector.   Climate control module.
13	7.5 A	Steering column control module.   Instrument cluster.
14	—	Not used.
15	15 A	SYNC.   Display.
16	—	Not used.
17	7.5 A	Active front steering module.   Park aid module.
18	7.5 A	Selectable drive modes switch.   Select shift switch.
19	5 A	Head up display.
20	5 A	Ignition switch.   Key inhibit solenoid.
21	5 A	Head up display.   In-vehicle temperature and humidity sensor.
22	5 A	Upfitter switches.
23	30 A	Driver front door module.
24	30 A	Moonroof.
25	—	Not used.
26	30 A	Passenger front door module.
27	—	Not used.
28	30 A	Amplifier.
29	15 A	Adjustable pedals switch.
30	5 A	Brake on-off output to trailer brake controller and customer access circuits.
31	10 A	Remote keyless entry.
32	20 A	Radio.
33	—	Not used.
34	30 A	Run/start relay.
35	—	Not used.
36	15 A	Camera module.   Lane keeping system.   Auto-dimming interior mirror.   Rear heated seats.
37	20 A	Heated steering wheel.
38	30 A	Power windows.