Table of Contents
The third-generation Focus was produced in 2011, 2012, 2013, 2014, 2015, 2016, 2017, and 2018 in sedan, hatchback, and estate (station wagon) body styles and was distributed to over 122 global markets. This model received a facelift in 2014. In this guide, we provide the locations, circuit descriptions, fuse box diagrams, and photo references for all fuse and relay panels on the third-generation Ford Focus (C1 platform; chassis code C346). We also specifically highlight the cigarette lighter / 12V power outlet fuse and provide an overview of all Electronic Control Unit (ECU) component locations.
Fuse assignments and circuit layouts may vary depending on the model year, equipment level, trim, and regional market specifications of your Ford Focus Mk3.
General Component Layout
Locations of all electronic control units (ECUs).
|
|
| № | Description |
| 1 | ABS control module |
| 2 | A/C control module |
| 3 | Anti-theft alarm siren — right side of luggage compartment |
| 4 | Audio interface control module |
| 5 | 12V Main battery |
| 6 | Data Link Connector (DLC / OBD-II) |
| 7 | DC/DC converter control module |
| 8 | Driver door control module |
| 9 | Left rear door control module |
| 10 | Front passenger door control module |
| 11 | Right rear door control module |
| 12 | Engine Control Module (ECM) — behind left front wheel arch liner |
| 13 | Engine cooling fan control module |
| 14 | Active grille shutter control module |
| 15 | Engine compartment fuse box 1 |
| 16 | Engine compartment fuse box 2 |
| 17 | Passenger compartment fuse box (Instrument panel) |
| 18 | Luggage compartment fuse box — left side of trunk |
| 19 | Glow plug control module — behind left front wheel arch liner |
| 20 | Headlamp control module |
| 21 | Blower motor resistor — adjacent to blower motor |
| 22 | Horn 1 |
| 23 | Horn 2 |
| 24 | Ignition switch control module |
| 25 | Instrument cluster display module |
| 26 | Instrument cluster control module |
| 27 | Keyless entry and remote start module |
| 28 | Lane Keeping Assist control module |
The Ford Focus Mk3 features three main fuse and relay panels: in the passenger compartment, under the hood (engine compartment), and in the luggage compartment (trunk).
Passenger Compartment Fuse Box
Located beneath the dashboard on the passenger side, behind the glove box, concealed by a removable soft trim panel.
Example photo.
| Diagram | |
|---|---|
|
|
| № | Circuit / Protected Component |
| 56 | 20A Fuel pump |
| 57 | Not used |
| 58 | Not used |
| 59 | 5A Passive Anti-Theft System (PATS) transceiver |
| 60 | 10A Interior lighting, driver door control module, glove box light, ambient lighting, overhead console, sunroof switch |
| 61 | 20A Cigarette lighter, rear 12V power socket |
| 62 | 5A Rain sensor, humidity sensor, auto-dimming rearview mirror |
| 63 | 10A Adaptive Cruise Control (ACC) system (Europe) |
| 64 | Not used |
| 65 | 10A Power tailgate / trunk release switch |
| 66 | 20A Driver door lock actuator, double locking system |
| 67 | 7.5A Infotainment display, SYNC module, GPS module, compass, Bluetooth / Voice Control (BVC) module |
| 68 | 15A Electronic steering column lock (ESCL) |
| 69 | 5A Instrument cluster |
| 70 | 20A Central locking system |
| 71 | 7.5A / 10A Air conditioning system, manual climate control module, dual-zone automatic climate control |
| 72 | 7.5A Steering column control module |
| 73 | 5A / 7.5A Data Link Connector (DLC), anti-theft alarm siren backup battery |
| 74 | 15A High-beam headlamps |
| 75 | 15A Front fog lamps |
| 76 | 10A Reverse / backup lamps |
| 77 | 20A Windscreen washer pump, rear window washer pump |
| 78 | 5A Ignition switch, push-button start, keyless entry/start module |
| 79 | 15A Hazard warning switch, audio system, navigation unit, DVD player, central locking switch |
| 80 | 20A Power sunroof, sunroof sunblind |
| 81 | 5A Interior motion sensor, RF receiver |
| 82 | 20A Windscreen washer pump |
| 83 | 20A Central locking system |
| 84 | 20A Driver door unlock, double locking system |
| 85 | 7.5A Audio system, navigation, passenger airbag deactivation switch, heated seat switch, auxiliary/parking heater, manual climate control module, sunroof module, air quality sensor, cabin temperature/humidity sensor, voltage stabilization module, front camera module |
| 86 | 10A Restraint Control Module (airbag and seat belt pretensioners), occupant classification system (OCS), passenger airbag status indicator, manual climate control module |
| 87 | 15A Heated steering wheel |
| 88 | 25A Voltage Quality Module (VQM) |
| 89 | - |
| Fuse 61 (20A) controls the cigarette lighter and 12V power outlets. | |
Engine Compartment Fuse Box
Main Fuse Box
Located on the left side of the engine compartment beneath a protective plastic cover, which features a fuse diagram stamped on its underside.
| Diagram | |
|---|---|
|
|
| № | Circuit / Protected Component |
| 7 | 40A ABS, ESP module |
| 8 | 30A ESP module |
| 9 | 30A Heated rear window / 40A Luggage compartment fuse box supply |
| 10 | 40A Climate control blower motor |
| 11 | 30A Voltage Quality Module (VQM), Auto Start-Stop system |
| 12 | 30A Engine control valve relay, EGR valve |
| 13 | 30A Starter relay |
| 14 | 40A Heated windscreen (right side) / 25A Rear power windows |
| 15 | 25A Engine cooling fan, Transmission Control Module (TCM) |
| 16 | 40A Heated windscreen (left side) / 20A Battery Monitoring Sensor (BMS) |
| 17 | 20A Auxiliary heater |
| 18 | 20A Windscreen wipers |
| 19 | 5A ABS, ESP module |
| 20 | 15A Horn |
| 21 | 5A Brake light switch |
| 22 | 15A Battery Monitoring System (BMS) / 5A Parking aid module |
| 23 | 5A Relay coils, headlamp switch |
| 24 | 20A Rear 12V power outlet / 5A Heated windscreen relay (right side) |
| 25 | 10A Power exterior mirrors |
| 26 | 15A / 20A / 25A Transmission Control Module (TCM) |
| 27 | 15A A/C compressor clutch |
| 28 | 5A Mass Air Flow (MAF) sensor, rear view camera, adaptive cruise control / 10A Rear view camera, Forward Collision Warning |
| 29 | 20A Headlamp washers / 10A Rear view camera, Forward Collision Warning |
| 30 | 5A Powertrain Control Module (PCM / ECM) |
| 31 | 15A Charge air cooler fan (1.6L Duratorq TDCi) |
| 32 | 10A Exhaust Gas Recirculation (EGR) valve, swirl control valves, heated oxygen sensors (HEGO), cooling fan relay coil |
| 33 | 10A Ignition coils |
| 34 | 10A Fuel injectors, auxiliary coolant pump, EVAP canister purge valve |
| 35 | 5A / 15A Active grille shutters, fuel filter heater (diesel), water-in-fuel sensor, ECM, ignition coils |
| 36 | 10A Powertrain Control Module (PCM) / 5A Active grille shutters |
| 37 | 5A ABS module / 15A Daytime Running Lights (DRL), headlamp control module / 20A Instrument panel 12V power outlet |
| 38 | 15A Powertrain Control Module (PCM), Transmission Control Module (TCM) |
| 39 | 5A Headlamp control module / 15A Power driver seat |
| 40 | 5A Electronic Power Assisted Steering (EPAS) |
| 41 | 20A Body Control Module (BCM) |
| 42 | 15A Rear window wiper motor |
| 43 | 15A Headlamp leveling module, Adaptive Front-lighting System (AFS) |
| 44 | 5A Adaptive Cruise Control (ACC) module |
| 45 | 10A Heated washer nozzles / 15A Power passenger seat |
| 46 | 25A Front power windows or engine cooling fan |
| 47 | 7.5A Heated exterior mirrors |
| 48 | 15A Diesel Particulate Filter (DPF) fuel vaporiser / 5A Power exterior mirrors |
| Fuses 24 and 37 (20A) also power additional 12V auxiliary power sockets. | |
| № | Relay Assignment |
| R1 | Charge air cooler fan |
| R2 | Horn |
| R3 | Diesel Particulate Filter (DPF) fuel vaporiser or heated windscreen (2014–2018 models) |
| R4 | Reserved |
| R5 | Rear window wiper |
| R6 | Engine cooling fan |
| R7 | Heated windscreen |
| R8 | Engine cooling fan |
| R9 | Headlamp washers |
| R10 | Engine cooling fan, starter motor |
| R11 | A/C compressor clutch |
| R12 | Engine cooling fan |
| R13 | Climate control blower motor |
| R14 | Powertrain Control Module (PCM) main relay |
| R15 | Starter motor, heated rear window |
| R16 | Ignition relay |
High-Current Pre-Fuse Box
Mounted directly onto the battery box cover.
| Diagram |
|---|
|
| F1 (80A) Electronic Power Assisted Steering (EPAS) module |
| F2 (150A) Starter motor |
| F3 (100A) Passenger compartment fuse box power feed |
| F4 (50A) Body Control Module (BCM) |
| F5 (80A) Auxiliary PTC heater |
| F6 (70A) Luggage compartment fuse box power feed |
| F7 - Not used |
| F8 (50A) Engine cooling fan control module |
| F9 (50A) Body Control Module (BCM) |
| F10 (60A) Glow plug control module |
Luggage Compartment Fuse Box
Located on the left side of the trunk behind the side wall trim panel.
Example photo.
| Diagram | |
|---|---|
|
|
| № | Description |
| 1 | 5A Relay coils |
| 2 | 10A Keyless entry system module |
| 3 | 5A Exterior door handle keyless entry sensors |
| 4 | 25A Front left door control module (power window, central locking, power folding/heated mirrors) |
| 5 | 25A Front right door control module (power window, central locking, power folding/heated mirrors) |
| 6 | 25A Rear left door control module (power window) |
| 7 | 25A Rear right door control module (power window) |
| 8 | 10A Anti-theft alarm siren (Europe) |
| 9 | 25A Power driver seat |
| 10 | 25A Power windows / 2014–2018: Audio amplifier |
| 11 | 5A Keyless entry system module / 25A Power passenger seat |
| 12 | 10A Climate control module (vehicles with Auto Start-Stop) |
| 13 | 5A Instrument cluster module (vehicles with Auto Start-Stop) |
| 14 | 7.5A Infotainment display, GPS module (vehicles with Auto Start-Stop) |
| 15 | 15A Audio system unit (vehicles with Auto Start-Stop) |
| 16 | - |
| 17 | - |
| 18 | - |
| 19 | - |
| 20 | - |
| 21 | - |
| 22 | - |
| 23 | 25A Premium audio amplifier |
| 24 | 30A Heated rear window |
| 25 | 20A Luggage compartment 12V power outlet |
| 26 | 40A Trailer tow module |
| 27 | - |
| 28 | 40A Trailer tow module |
| 29 | 5A Blind Spot Information System (BLIS), Lane Departure Warning / Lane Keeping Assist, Active City Stop, rear view camera |
| 30 | 5A Parking aid module |
| 31 | - |
| 32 | - |
| 33 | 15A Rear window wiper relay |
| 34 | 15A Heated driver seat |
| 35 | 15A Heated passenger seat |
| 36 | - |
| 37 | 5A Power sunroof module |
| 38 | - |
| 39 | - |
| 40 | - |
| 41 | 5A Retractable towbar module |
| 42 | - |
| 43 | - |
| 44 | 10A Power exterior mirrors |
| 45 | 7.5A Heated exterior mirrors |
| 46 | 5A Blind Spot Information System (BLIS), Lane Keeping Assist, rear view camera (vehicles with Auto Start-Stop) |
| R1 | Ignition switch relay |
| R2 | Heated rear window relay |
| R3 | Rear window wiper relay |
| R4 | - |
| R5 | Anti-theft alarm siren relay |
| R6 | Auxiliary relay |