Learn about Ford Bronco (U725) 2021 fuse box and relay’s locations, functions, and maintenance tips for optimal vehicle electrical system.
The 2021 Ford Bronco (U725) is a rugged off-road SUV that comes in two body styles: the two-door and four-door models. The two-door version offers a classic, compact look with seating for up to four passengers, while the four-door version provides additional space and convenience for families or adventurers with room for five and more cargo capacity. Both versions feature removable doors and roof panels, allowing for an open-air driving experience. Advanced technology and performance enhancements, such as terrain management systems, make the Bronco a standout for off-road enthusiasts.
The Bronco’s electrical systems, which power critical components like lights, power windows, and advanced safety features, rely on strategically placed fuse boxes and relays. The main fuse box is located under the hood near the engine bay, while an additional fuse panel is found inside the cabin beneath the dashboard. Relays, responsible for managing high-power circuits like the starter and fuel pump, are located close to these fuse boxes. Regular maintenance and understanding their locations are vital for ensuring the vehicle’s reliability, especially during demanding off-road use.
MUST READ: DYI – How to Check Car Fuses?
(2021) Ford Bronco (U725) fuse box and relay with Diagram
WARNING
- Never replace a fuse with one that has a higher amperage rating.
- A fuse with a too-high amperage could damage the electrical part and cause a fire.
- On no account should fuses be repaired (e.g. patched up with tin foil or wire) as this may cause serious damage elsewhere in the electrical circuit or cause a fire.
- If a fuse blows repeatedly, do not keep replacing it. Instead, have the cause for the repeated short circuit or overload tracked and fixed.
- Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
Ford Bronco (U725) 2021 fuse assignment
Ford Bronco (U725) Year of production: 2021
Body Control Module Fuse Box:
Under Hood Fuse Box:
Fuse Box Diagrams
2021
Body Control Module Fuse Box
List of fuses in the body control module fuse box (2021)
| № | A | Protected Component |
|---|---|---|
| 1 | – | Not used. |
| 2 | 10A | Power Windows. DC/AC inverter. |
| 3 | 7.5A | Exterior mirrors. Wireless charging module. |
| 4 | 20A | Not used (spare). |
| 5 | – | Not used. |
| 6 | 10A | Anti-theft alarm horn. |
| 7 | 10A | Not used. |
| 8 | 5A | Not used (spare). |
| 9 | 5A | Not used (spare). |
| 10 | – | Not used. |
| 11 | – | Not used. |
| 12 | 7.5A | Climate control. Gateway module. |
| 13 | 7.5A | Steering column control module. Instrument cluster module. |
| 14 | 15A | Not used (spare). |
| 15 | 15A | Not used (spare). |
| 16 | – | Not used. |
| 17 | 7.5A | Not used (spare). |
| 18 | 7.5A | Not used (spare). |
| 19 | 5A | Ignition switch. Headlamps. |
| 20 | 5A | Telematics modem. |
| 21 | 5A | In-vehicle temperature and humidity sensor. |
| 22 | 5A | Not used. |
| 23 | 30A | Not used (spare). |
| 24 | 30A | Not used (spare). |
| 25 | 20A | Not used (spare). |
| 26 | 30A | Not used (spare). |
| 27 | 30A | Not used (spare). |
| 28 | 30A | Not used (spare). |
| 29 | 15A | Not used (spare). |
| 30 | 5A | Brake on-off switch. |
| 31 | 10A | Terrain management switch. Integrated control panei switch. Driveline and chassis Controls switch panei. 12 inch center display. Radio frequency receiver module. |
| 32 | 20A | Audio control module. |
| 33 | – | Not used. |
| 34 | 30A | Run/start relay. |
| 35 | 5A | Not used (spare). |
| 36 | 15A | Automatic high beam. Image Processing module A. |
| 37 | 20A | Auto-dimming interior mirror. Parking assist control module. Heated steering wheel. |
| 38 | 30A Circuit Breaker | Not used. |
Under Hood Fuse Box
List of fuses in the under hood fuse box (2021)
| № | A | Protected Component |
|---|---|---|
| 1 | 30A | Body control module – battery power in feed 1. |
| 3 | 30A | Body control module – battery power in feed 2. |
| 4 | 30A | Fuel pump. |
| 6 | 25A | Powertrain control module power. |
| 7 | 30A | Powertrain components. |
| 8 | 20A | Powertrain components. |
| 9 | 20A | Ignition coils. |
| 13 | 40A | Blower motor. |
| 16 | 10A | Rear windshield washer. |
| 18 | 30A | Starter motor. |
| 21 | 10A | Not used (spare). |
| 22 | 10A | 360 degree camera module. |
| 23 | 10A | Anti-lock brake system run-start feed. |
| 24 | 10A | Powertrain control module. Power steering module. |
| 25 | 10A | Blind spot information system. Rear view camera. Adaptive cruise control. Driveline control module. |
| 25 | 15A | Transmission control module. |
| 28 | 60A | Anti-lock brake system valves. |
| 29 | 60A | Anti-lock brake system pump. |
| 30 | 30A | Driver power seat. |
| 31 | 30A | Passenger power seat. |
| 32 | 20A | Auxiliary power point. |
| 33 | 20A | Auxiliary power point. |
| 34 | 20A | Auxiliary power point. |
| 36 | 40A | 150 watt DC/AC inverter. |
| 38 | 30A | Heated seat module. |
| 42 | 30A | Trailer brake control module. |
| 44 | 10A | Brake on-off switch. |
| 46 | 20A | SYNC module. |
| 50 | 40A | Heated rear windshield. |
| 54 | 40A | Driveline control module. |
| 55 | 30A | Trailer tow park lamp relay. |
| 58 | 20A | Trailer tow backup lamps. |
| 60 | 30A | Upfitter switch #1. |
| 61 | 15A | Upfitter switch #2. |
| 62 | 10A | Upfitter switch #3. |
| 63 | 10A | Upfitter switch #4. |
| 64 | 10A | Upfitter switch #5. |
| 65 | 10A | Upfitter switch #6. |
| 66 | 10A | Stability bar disconnect module. |
| 69 | 30A | Front windshield wiper. |
| 71 | 30A | Rear windshield wiper. |
| 91 | 40A | Trailer tow light module. |
| 100 | 20A | Left-hand headlamps. |
| 101 | 20A | Right-hand headlamps. |
| 107 | 30A | Trailer tow battery charge. |
| 120 | 10A | Fuel injectors (2.7L). |
| 124 | 5A | Not used (spare). |
| 125 | 10A | USB smart charger 1. |
| 139 | 5A | USB smart charger 2. |
| 140 | 5A | Not used (spare). |
| 141 | 5A | Not used (spare). |
| 146 | 20A | Amplifier. |
| 158 | 10A | Stability bar disconnect module run/start. |
| 160 | 10A | Smart data link control. |
| 182 | 60A | Driver door module. |
| 183 | 60A | Passenger door module. |
| 202 | 60A | Body control module B+. |
| 210 | 30A | Body control module start stop. |
Conclusion
The 2021 Ford Bronco balances off-road capability with modern technology, supported by a dependable electrical system. Proper care of the fuse box and relays ensures peak performance.
