The 2021 Ford F-150 is the first model year of the fourteenth-generation P702. Compared with the previous F-150, Ford changed the fuse layout and numbering, and the PowerBoost Hybrid joined the range. The tables below cover the two main 12 V fuse panels and all positions listed for the 2021 model.
If you need the electric pickup, use the separate 2022-2023 Ford F-150 Lightning guide. The Lightning has similar bodywork but a fundamentally different high-voltage electrical architecture. The smaller 2022 Ford Maverick also uses different fuse assignments.
Where are the fuse boxes in a 2021 Ford F-150?
Under-hood fuse box: located in the engine compartment under a large black power-distribution-box cover. Before servicing high-current fuses, disconnect the 12 V battery and reinstall the cover before reconnecting it.
Body Control Module fuse box: located low under the instrument panel on the passenger side, in the front footwell area. Removing the lower trim gives access to positions 1-38.
Under-hood fuse box
| Fuse / relay | Rating [A] | Protected component / function |
|---|---|---|
| 1 | 40 | Body control module (BCM) – power 1 |
| 3 | 40 | BCM – power 2 |
| 4 | 30 | Fuel pump |
| 5 | 5 | Keep-alive memory; PCM on Hybrid |
| 6 | 25 | PCM power |
| 7 | 20 | PCM power |
| 8 | 20 / 10 | PCM – 20 A Hybrid, 10 A gasoline/diesel |
| 9 | 20 | PCM power |
| 10 | 20 | PCM – diesel |
| 11 | 30 | Starter |
| 13 | 40 | Blower motor |
| 15 | 25 | Horn |
| 19 | 20 | Snow-plow switch / rear heated seats on gasoline models |
| 21 | 10 | Headlamp run/start feed |
| 22 | 10 | Electronic power-assist steering |
| 23 | 10 | Electric brake booster |
| 24 | 10 | PCM gasoline/Hybrid; TCM and glow-plug controller diesel |
| 25 | 10 | CHMSL camera, trailer camera, 2 kW inverter, analog camera |
| 28 | 50 | Electric brake booster |
| 29 | 50 | Electric brake booster |
| 30 | 40 | Driver power seat |
| 31 | 30 | Passenger power seat |
| 32 | 20 | Power point |
| 33 | 20 | Power point / USB smart charger |
| 34 | 20 | Power point |
| 37 | 30 | Tailgate module |
| 38 | 40 | Climate-controlled seats / power running boards |
| 41 | 25 | Power sliding rear window |
| 42 | 30 | Trailer brake controller |
| 47 | 50 | Cooling fan |
| 48 | 20 | Rear heated seats – diesel/Hybrid |
| 49 | 50 | Cooling fan |
| 50 | 40 | Heated rear window – gasoline/Hybrid |
| 55 | 30 | Trailer parking lamps |
| 56 | 20 | Trailer stop/turn lamps |
| 58 | 10 | Trailer backup lamps |
| 64 | 25 | 4×4 system |
| 65 | 15 | TCM – diesel |
| 67 | 20 | Transmission run/start |
| 69 | 30 | Left-hand windshield wiper |
| 80 | 15 | Spare |
| 82 | 25 | 4×4 system |
| 83 | 50 | Supplemental heater – diesel |
| 84 | 50 | Supplemental heater – diesel |
| 85 | 50 | Supplemental heater – diesel |
| 86 | 25 | SCR system – diesel |
| 91 | 20 | Trailer lighting module |
| 95 | 15 | PCM power – Hybrid |
| 98 | 10 | PCM and coolant pumps – Hybrid |
| 100 | 15 | Left-hand headlamp |
| 101 | 15 | Right-hand headlamp |
| 105 | 50 | Active front steering |
| 107 | 30 | Trailer battery charge |
| 121 | 30 | Fuel-filter heater – diesel |
| 124 | 5 | Rain sensor |
| 125 | 10 | USB smart charger |
| 134 | 25 | Multi-contour seat relay |
| 138 | 10 | Tailgate release |
| 139 | 5 | USB smart charger |
| 146 | 15 | High-voltage battery control module – Hybrid |
| 159 | 5 | DC/DC converter – Hybrid |
| 160 | 10 | Smart Data Link |
| 162 | 7.5 | Spare |
| 168 | 20 | High-voltage battery control module – Hybrid |
| 169 | 10 | Electric motor coolant pump – Hybrid |
| 170 | 10 | Pedestrian sounder / battery module / electric motor coolant pump – Hybrid |
| 202 | 60 | BCM B+ |
| 210 | 30 | BCM start/stop |
| R04 | relay | Electric fan 1 |
| R06 | relay | Electric fan 3 |
| R35 | relay | Supplemental heater |
| R36 | relay | Supplemental heater |
Body Control Module fuse box
| Fuse | Rating [A] | Protected component / function |
|---|---|---|
| 1 | – | Not used |
| 2 | 10 | Delayed accessory power |
| 3 | 7.5 | Wireless charger |
| 4 | 20 | Not used |
| 5 | – | Not used |
| 6 | 10 | Driver window switch |
| 7 | 10 | Gear shift module |
| 8 | 5 | Phone connectivity module |
| 9 | 5 | Combined sensor module |
| 10 | – | Not used |
| 11 | – | Not used |
| 12 | 7.5 | Enhanced Central Gateway / climate control |
| 13 | 7.5 | Instrument cluster / steering column control module |
| 14 | 15 | Spare |
| 15 | 15 | Integrated control panel / SYNC |
| 16 | – | Not used |
| 17 | 7.5 | Headlamp control module |
| 18 | 7.5 | Not used |
| 19 | 5 | Lighting switch |
| 20 | 5 | Passive start / ignition switch / key lock |
| 21 | 5 | Trailer brake switch |
| 22 | 5 | Not used |
| 23 | 30 | Driver door module |
| 24 | 30 | Moonroof |
| 25 | 20 | Not used |
| 26 | 30 | Passenger door module |
| 27 | 30 | Not used |
| 28 | 30 | Audio amplifier |
| 29 | 15 | 12-inch display / adjustable pedals |
| 30 | 5 | Not used |
| 31 | 10 | RF receiver / driver monitoring / Terrain Management |
| 32 | 20 | Audio control module |
| 33 | – | Not used |
| 34 | 30 | Run/start relay |
| 35 | 5 | 400 W inverter run/start |
| 36 | 15 | Electrochromic mirror / rear heated seats / active steering / heated steering wheel |
| 37 | 20 | Advanced driver-assistance systems |
| 38 | 30 | Rear power-window circuit breaker |
Commonly checked fuses
- Fuel pump: fuse 4 – 30 A.
- Starter: fuse 11 – 30 A.
- Horn: fuse 15 – 25 A.
- SYNC: BCM fuse 15 – 15 A.
- Radio / audio module: BCM fuse 32 – 20 A.
- Audio amplifier: BCM fuse 28 – 30 A.
- USB: positions 33, 125 and 139 depending on the outlet.
- 4×4: fuses 64 and 82 – 25 A each.
- Trailer: fuses 42, 55, 56, 58, 91 and 107.
- PowerBoost Hybrid – DC/DC: fuse 159 – 5 A.
- PowerBoost Hybrid – high-voltage battery: fuses 146 and 168.
FAQ – 2021 Ford F-150 fuses
Where is the fuel-pump fuse?
In the under-hood box at position 4, rated at 30 A.
Where is the radio fuse?
The audio control module is protected by BCM fuse 32 – 20 A. Vehicles with the additional amplifier also use BCM fuse 28 – 30 A.
Does the PowerBoost Hybrid use the same fuse boxes?
Yes. It uses the same main panels but adds several Hybrid-specific positions for the high-voltage battery, coolant pumps and DC/DC converter.
Does this diagram apply to the F-150 Lightning?
No. The Lightning is battery-electric and uses a different electrical and fuse architecture.