2019 Ford F-150 Fuse Box Diagram & Amperage
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Quick answer
The 2019 Ford F-150 has three main fuse box locations: under the hood (Power Distribution Box), inside the cabin on the passenger side kick panel (Smart Junction Box), and depending on the configuration, sometimes a rear fuse box or auxiliary trailer fuse box. Always refer to the fuse diagrams printed on the inside of the fuse box covers for the most accurate information for your specific vehicle's trim level and options as fuse assignments can vary.
Under-Hood Power Distribution Box
This fuse box is located in the engine compartment, typically near the battery on the driver's side. It houses high-amperage fuses and relays for major components like the powertrain control module (PCM), anti-lock braking system (ABS), cooling fan, and starter.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| 1 | 20A | Yellow | Powertrain Control Module (PCM) |
| 2 | 20A | Yellow | Fuel Pump |
| 3 | 30A | Green | ABS Pump Motor |
| 4 | 40A | Green | ABS Valve Solenoids |
| 5 | 20A | Yellow | Ignition Coils |
| 6 | 30A | Green | Starter Motor |
| 10 | 10A | Red | Headlamp (Low Beam, Left) |
| 11 | 10A | Red | Headlamp (Low Beam, Right) |
| 12 | 15A | Blue | Headlamp (High Beam, Left) |
| 13 | 15A | Blue | Headlamp (High Beam, Right) |
| 14 | 20A | Yellow | Blower Motor |
| 15 | 10A | Red | A/C Clutch |
| 16 | 30A | Green | Trailer Brake Controller |
| 18 | 15A | Blue | Radio/Infotainment (Main) |
| 20 | 20A | Yellow | Power Outlet (12V Front/Console) |
Relays: The under-hood box also contains several relays, including those for the starter, fuel pump, PCM, and cooling fan. Their exact locations are usually marked on the fuse box lid.
Passenger Side Kick Panel (Smart Junction Box - SJB)
This fuse box, often referred to as the Smart Junction Box (SJB), is located inside the cabin, behind the kick panel on the passenger side. It controls many interior electrical components, such as power windows, radio, interior lights, and some exterior lighting.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| 1 | 15A | Blue | Radio/Infotainment System |
| 2 | 10A | Red | Airbag Control Module |
| 3 | 20A | Yellow | Power Outlet (12V Rear/Bed) |
| 4 | 15A | Blue | Tail Lamps/Parking Lamps |
| 5 | 15A | Blue | Brake Lamps |
| 6 | 10A | Red | Instrument Cluster |
| 7 | 10A | Red | Ignition Switch |
| 8 | 5A | Tan | ECM/Key Sense |
| 9 | 15A | Blue | Turn Signals/Hazard Lights |
| 10 | 20A | Yellow | Blower Motor Control |
| 11 | 15A | Blue | Wiper Motor (Front) |
| 12 | 10A | Red | Horn |
| 13 | 5A | Tan | ABS Module |
Relays: The SJB integrates many functions, so dedicated relays are less common here compared to the under-hood box, with many functions controlled by transistors within the SJB itself. However, some models might have a few integrated relays for specific features.
Rear Fuse Box / Auxiliary Trailer Fuse Box (If Equipped)
Some 2019 Ford F-150 models, particularly those with towing packages or extended cabs/crews, may have an auxiliary fuse box. This is often located in the rear of the vehicle, sometimes behind a panel in the trunk or under the rear seats. Its primary function is to support trailer wiring and other rear-mounted accessories.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| 1 | 20A | Yellow | Trailer Tow Battery Charge |
| 2 | 30A | Green | Trailer Tow Electric Brake |
| 3 | 15A | Blue | Trailer Tow Park Lights |
| 4 | 15A | Blue | Trailer Tow Left Turn/Brake |
| 5 | 15A | Blue | Trailer Tow Right Turn/Brake |
| 6 | 10A | Red | Trailer Tow Reverse Lights |
Relays: This box often contains relays for trailer turning signals and trailer backup lights.
How to Test a Fuse
If an electrical component in your 2019 Ford F-150 stops working, the first thing to check is often the corresponding fuse. Here
Before you pull a fuse on the 2019 Ford F-150
- 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 2019 Ford F-150
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
Maintenance & repair guides
2019 Ford F-150 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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