2020 Ford F-250 Super Duty Fuse Box Diagram
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Quick answer
On the 2020 Ford F-250 Super Duty, you will find three main fuse box locations:
- Passenger Compartment Fuse Panel: Located in the front passenger footwell, behind a trim panel.
- Power Distribution Box: Located in the engine compartment on the driver's side.
- Luggage Compartment Fuse Box: Located in the rear of the cab on the driver's side, behind a trim panel.
Passenger Compartment Fuse Panel Diagram
This fuse panel is located in the passenger-side kick panel area. You may need to remove a trim panel to access it. Always verify the fuse locations with the diagram printed on the inside of the fuse box cover, as configurations can vary based on your truck's specific options and trim level.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| 1 | 20A | Blue | Power point #3 (Console rear) |
| 2 | 20A | Blue | Power point #2 (Console inside) |
| 3 | 10A | Red | Vehicle Power 4 (VPWR4) |
| 5 | 10A | Red | Ignition switch |
| 8 | 5A | Tan | Keypad backlighting |
| 9 | 15A | Blue | Blower motor relay coil |
| 10 | 10A | Red | Infotainment display, GPS module |
| 13 | 7.5A | Brown | Steering wheel controls |
| 15 | 10A | Red | Airbag module, occupant classification sensor |
| 22 | 10A | Red | Powertrain Control Module (PCM), AWD module |
| 23 | 20A | Blue | Cigar lighter, Power point #1 (front) |
| 24 | 10A | Red | Right high-beam headlamp |
| 26 | 15A | Blue | Low beam headlamps |
| 28 | 5A | Tan | Rain sensor module |
| 29 | 30A | Green | Power driver seat |
| 32 | 10A | Red | A/C clutch relay coil |
| 33 | 15A | Blue | Horn |
| 34 | 7.5A | Brown | ABS module, stability control |
| 35 | 5A | Tan | Starter/ignition relay |
| 37 | 20A | Blue | Audio system / Radio |
Relays in Passenger Compartment Fuse Panel:
- R1: Blower Motor Relay
- R2: Not Used
- R4: A/C Clutch Relay
- R6: Horn Relay
Power Distribution Box (Under-Hood) Diagram
This fuse box is located in the engine bay, typically on the driver's side near the battery. It contains higher-amperage fuses and relays for major vehicle systems.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| 13 | 40A | Green | Blower Motor |
| 14 | 30A | Green | Trailer tow (TT) park lamps |
| 15 | 25A | Natural | Trailer tow (TT) stop/turn lamps |
| 18 | 30A | Green | Upfitter switch #1 |
| 19 | 30A | Green | Upfitter switch #2 |
| 20 | 30A | Green | Upfitter switch #3 |
| 21 | 30A | Green | Upfitter switch #4 |
| 25 | 20A | Blue | Fuel pump |
| 34 | 25A | Natural | Powertrain Control Module (PCM) |
| 35 | 40A | Green | ABS pump |
| 36 | 30A | Green | Starter motor |
| 43 | 20A | Blue | Ignition coils |
| 47 | 30A | Green | Trailer brake controller |
| 59 | 20A | Blue | Left high-beam headlamp |
| 61 | 60A | Yellow | Main cabin fuse panel power |
| 70 | 30A | Green | Brake vacuum pump |
| 73 | 25A | Natural | Tail lights, parking lights |
Relays in Power Distribution Box:
- R2: Fuel Pump Relay
- R5: Starter Relay
- R6: Powertrain Control Module (PCM) Relay
- R12: Trailer Tow Park Lamp Relay
- R14: A/C Clutch Relay
- R34: Trailer Tow Stop/Turn Relay
How to test a fuse
Testing a fuse is a simple process.
- Safety First: Turn the vehicle's ignition completely off.
- Locate & Remove: Locate the suspect fuse using the diagram. Use a fuse puller tool (often found in the fuse box lid) or a pair of needle-nose pliers to gently pull the fuse straight out of its slot.
- Visual Inspection: Hold the fuse up to the light. Inside the plastic body, you will see a small metal strip. If this strip is broken or melted, the fuse is blown and needs to be replaced.
- Multimeter Test (for certainty): For a more definitive test, set a multimeter to the continuity setting (it often looks like a sound wave symbol). Touch one probe to each metal blade on the top of the fuse. If the multimeter beeps or shows a reading of zero (or very close to zero) ohms, the fuse is good. If it remains silent or shows "OL" (Open Line), the fuse is blown.
When replacing a fuse, always use a new one with the exact same amperage rating. Using a higher-rated fuse can cause severe damage to the electrical system and create a fire hazard.
Common blown fuses on this vehicle
- Fuse #23 (Passenger Compartment): This 20A fuse protects the front cigar lighter and 12V power point. It commonly blows when a faulty phone charger or other accessory is plugged in. Check the device you plugged in for damage before replacing the fuse.
- Fuse #47 (Power Distribution Box): This 30A fuse is for the trailer brake controller. It can blow if there is a short in the wiring on your trailer. Before replacing the fuse, inspect the trailer's wiring harness and connector for any corrosion, frayed wires, or damage.
- Fuse #13 (Power Distribution Box): The 40A blower motor fuse can blow if the blower motor itself is failing or if debris has gotten into the fan cage, causing it to seize. If this fuse blows repeatedly, the blower motor resistor or the motor itself likely needs replacement.
Remember to always consult the owner's manual or the diagram on the fuse box lid for the most accurate information specific to your vehicle's trim and options.
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Before you pull a fuse on the 2020 Ford F-250 Super Duty
- Use the label printed on the panel cover or the owner's manual for your exact build. Layouts change with options, model year and build date, so a chart for another truck can be wrong.
- Replace a blown fuse only with the same amp rating. A larger fuse can let wiring overheat.
- A fuse that blows again right away means a short or failing component downstream. Find the cause before replacing it again.
- A good fuse doesn't prove the circuit works — relays, grounds and connectors fail too.
- Disconnect the battery before working near high-current fuses or cables.
Learn more: How fuses, relays and truck electrical systems work
More specs for the 2020 Ford F-250 Super Duty
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Tire Size & Pressure
OEM size, cold psi, bolt pattern, wheel size, TPMS.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
2014 F-250 Super Duty
2015 F-250 Super Duty
2016 F-250 Super Duty
2017 F-250 Super Duty
2018 F-250 Super Duty
2019 F-250 Super Duty
Maintenance & repair guides
2020 Ford F-250 Super Duty Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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