The 2015 Ford F450 is a heavy-duty truck known for its durability, towing capacity, and exceptional performance. Whether you use it for work or recreation, understanding how its electrical system functions and which fuses protect different circuits is essential.
This article serves as a comprehensive guide to the 2015 Ford F450 fuse box diagram, providing a clear overview of the fuse box layout, the purpose of each fuse, and their respective amperage ratings.
Table of Contents
Identifying the Fuse Types
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.
2015 Ford F450 Fuse Box Diagram (Power Distribution Box)
Situated within the engine compartment, the power distribution box contains crucial high-current fuses that serve as essential safeguards for the primary electrical systems of your vehicle.
These fuses play a vital role as protective barriers, shielding the vital components of your vehicle’s electrical system from potential harm caused by excessive electrical currents. Their significance lies in maintaining the integrity and ensuring the optimal performance of the main electrical systems in your vehicle.
*Cartridge fuses **Mini fuses
| Fuse or relay number | Fuse amp rating | Protected components |
| 1 | Relay | Blower motor |
| 2 | — | Not used |
| 3 | Relay | Urea heaters (diesel engine) |
| 4 | — | Not used |
| 5 | Relay | Heated mirrors Rear window defroster |
| 6 | — | Not used |
| 7 | 50A* | Heated mirrors Rear window defroster |
| 8 | 30A* | Passenger seat |
| 9 | 30A* | Driver seat |
| 10 | 40A* | Trailer tow |
| 11 | — | Not used |
| 12 | 30A* | Driver smart window motor |
| 13 | — | Not used |
| 14 | — | Not used |
| 15 | Diode | Fuel pump (diesel engine) |
| 16 | — | Not used |
| 17 | 15A** | Heated mirror |
| 18 | — | Not used |
| 19 | — | Not used |
| 20 | — | Not used |
| 21 | — | Not used |
| 22 | 30A* | Trailer tow electric brake |
| 23 | 40A* | Blower motor |
| 24 | — | Not used |
| 25 | 30A* | Wipers |
| 26 | 30A* | Trailer tow park lamps |
| 27 | 25A* | Urea heaters (diesel engine) |
| 28 | — | Buss bar |
| 29 | Relay | Trailer tow park lamps |
| 30 | Relay | A/C clutch |
| 31 | Relay | Wipers |
| 32 | — | Not used |
| 33 | 15A** | Vehicle power 1 |
| 34 | 15A** | Vehicle power 2 (diesel engine) |
| 20A** | Vehicle power 2 (gas engine) | |
| 35 | 10A** | Vehicle power 3 |
| 36 | 15A** | Vehicle power 4 (diesel engine) |
| 20A** | Vehicle power 4 (gas engine) | |
| 37 | 10A** | Vehicle power 5 (diesel engine) |
| 38 | Relay | Electronic control module (diesel engine) Powertrain control module (gas engine) |
| 39 | 10A** | 4×4 hub lock |
| 40 | 15A** | 4×4 electronic lock |
| 41 | — | Not used |
| 42 | 20A** | Rear heated seats |
| 43 | — | Not used |
| 44 | — | Not used |
| 45 | 10A** | Run/start relay coil |
| 46 | 10A** | Transmission control module keep-alive power (diesel engine) |
| 47 | 10A** | A/C clutch feed |
| 48 | Relay | Run/start |
| 49 | 10A** | Rearview camera system |
| 50 | 10A** | Blower motor relay coil |
| 51 | — | Not used |
| 52 | 10A** | Electronic control module Powertrain control module Transmission control module run/start |
| 53 | 10A** | 4×4 module |
| 54 | 10A** | Anti-lock brake system run/start |
| 55 | 10A** | Rear window defroster coil |
| 56 | 20A** | Passenger compartment fuse panel run/start feed |
| 57 | Relay | Fuel pump |
| 58 | — | Not used |
| 59 | — | Not used |
| 60 | — | Not used |
| 61 | — | Not used |
| 62 | — | Not used |
| 63 | — | Not used |
| 64 | — | Not used |
| 65 | — | Not used |
| 66 | 20A** | Fuel pump |
| 67 | — | Not used |
| 68 | 10A** | Fuel pump relay coil |
| 69 | — | Not used |
| 70 | 10A** | Trailer tow backup lamp |
| 71 | 10A** | Canister vent (gas engine) |
| 72 | 10A** | Electronic control module relay coil feed keep-alive power Powertrain control module |
| 73 | — | Not used |
| 74 | — | Not used |
| 75 | — | Not used |
| 76 | Relay | Trailer tow backup lamp |
| 77 | — | Not used |
| 78 | — | Not used |
| 79 | — | Not used |
| 80 | — | Not used |
| 81 | — | Not used |
| 82 | 20A* | Auxiliary power point #2 |
| 83 | 20A* | Auxiliary power point #1 |
| 84 | 30A* | 4×4 shift motor |
| 85 | 30A* | Heated/cooled seats |
| 86 | 25A* | Anti-lock brake system coil feed |
| 87 | 20A* | Auxiliary power point #5 |
| 88 | 20A* | Auxiliary power point #6 |
| 89 | 40A* | Starter motor |
| 90 | 25A* | Trailer tow battery charge |
| 91 | — | Not used |
| 92 | 20A* | Auxiliary power point #4 |
| 93 | 20A* | Auxiliary power point #3 |
| 94 | 25A* | Auxiliary switch #1 |
| 95 | 25A* | Auxiliary switch #2 |
| 96 | 50A* | Anti-lock brake system pump |
| 97 | 40A* | Inverter |
| 98 | — | Not used |
| 99 | 40A* | Instrument panel power inverter |
| 100 | — | Not used |
| 101 | Relay | Starter |
| 102 | — | Not used |
| 103 | — | Not used |
| 104 | — | Not used |
| 105 | — | Not used |
| 106 | — | Not used |
| 107 | — | Not used |
2015 Ford F450 Passenger Compartment Fuse Panel Diagram
The passenger compartment fuse panel in the 2015 Ford F450 is located in the footwell area on the passenger side. To access the fuses, follow these steps:
| Fuse or relay number | Fuse amp rating | Protected components |
| 1 | 30A | Not used (spare) |
| 2 | 15A | Auxiliary switch relay #4 |
| 3 | 30A | Passenger smart window motor |
| 4 | 10A | Hood lamp Interior lights |
| 5 | 20A | Moonroof |
| 6 | 5A | Driver seat module |
| 7 | 7.5A | Driver lumbar motor Driver seat switch |
| 8 | 10A | Power mirror switch |
| 9 | 10A | Auxiliary switch relay #3 |
| 10 | 10A | Customer access feed Run/accessory relay |
| 11 | 10A | Instrument cluster |
| 12 | 15A | Interior lighting Lighted running board lamps |
| 13 | 15A | Right turn signals and brake lamps |
| 14 | 15A | Left turn signals and brake lamps |
| 15 | 15A | Backup lamps, Trailer tow backup relay High-mounted stop lamps Reverse signal interior mirror |
| 16 | 10A | Right low beam headlamp |
| 17 | 10A | Left low beam headlamp |
| 18 | 10A | Brake shift interlock Keypad illumination Passive anti-theft transceiver Powertrain control module |
| 19 | 20A | Amplifier Subwoofer |
| 20 | 20A | Power door locks |
| 21 | 10A | Brake on/off switch |
| 22 | 20A | Horn |
| 23 | 15A | Not used (spare) |
| 24 | 15A | Diagnostic connector Electronic finish panel Power fold mirror relay Remote keyless entry Steering wheel control module |
| 25 | 15A | Not used (spare) |
| 26 | 5A | Steering wheel control module |
| 27 | 20A | Not used (spare) |
| 28 | 15A | Ignition switch |
| 29 | 20A | GPS module Radio SYNC |
| 30 | 15A | Parking lamp relay Trailer tow parking lamp relay |
| 31 | 5A | Customer access Trailer brake controller (brake signal) |
| 32 | 15A | Auto dimming mirror Driver and passenger door lock switch illumination Driver and passenger smart window motor Moonroof motor Passenger window switch Power inverter Rear heated seat switch illumination Telescoping mirror switch |
| 33 | 10A | Restraint control module |
| 34 | 10A | Heated steering wheel module Rear heated seats module |
| 35 | 5A | Reverse park aid module Select shift switch Trailer brake control module |
| 36 | 10A | Fuel tank select switch |
| 37 | 10A | Positive temperature coefficient heater |
| 38 | 10A | AM/FM base radio |
| 39 | 15A | High beam headlamps |
| 40 | 10A | Parking lamps (in mirrors) Roof marker lamps |
| 41 | 7.5A | Passenger airbag deactivation indicator |
| 42 | 5A | Not used (spare) |
| 43 | 10A | Wiper relay |
| 44 | 10A | Auxiliary switches |
| 45 | 5A | Not used (spare) |
| 46 | 10A | Climate control |
| 47 | 15A | Fog lamps Fog lamp indicator (in switch) |
| 48 | 30A Circuit breaker | Power rear sliding window switch Power windows switch Moonroof switch |
| 49 | Relay | Delayed accessory |
Tom Smith is a passionate car mechanic and automotive enthusiast, specializing in the intricate world of car fuse boxes. With years of hands-on experience under the hood, he has earned a reputation as a reliable expert in his field. As the founder and content creator of the popular blog website 'carsfuse.com,' Tom has dedicated himself to sharing his extensive knowledge of car fuse boxes and electrical systems with the world.