Learn about Ford Focus (EU) (C346; 2015-2018) fuse box and relay’s locations, functions, and maintenance tips for optimal vehicle electrical system.
The facelifted third-generation Ford Focus (C346 platform), updated for the 2015 model year, brought a refreshed design, improved technology, and refined engine options including efficient EcoBoost powertrains. Behind these updates, the Focus continues to depend on fuses and relays to protect its electrical system from power surges, short circuits, and wiring faults that could otherwise cause serious damage.
If you’re dealing with issues like non-working headlights, a malfunctioning SYNC infotainment system, or wipers that won’t respond, a blown fuse or faulty relay is often the cause. Knowing exactly where your Focus’s fuse boxes are located and how to access them safely, can help you quickly diagnose and resolve many electrical issues without an unnecessary trip to the garage.
This guide covers the fuse box and relay locations for the 2015–2018 Ford Focus (C346), along with safe access methods and practical tips for identifying the correct fuse or relay.
MUST READ: DYI – How to Check Car Fuses?
(2015-2018) Ford Focus (EU) C346 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 Focus (EU) (C346; 2015-2018) fuse assignment
Ford Focus (EU) C346 Year of production: 2015, 2016, 2017, 2018.
Where Are the Fuse Boxes Located on the Ford Focus (C346, 2015–2018)?
The 2015–2018 Ford Focus is equipped with two main fuse box locations: one in the engine compartment and one inside the cabin. This layout remains consistent with the pre-facelift C346 Focus, with only minor updates to internal fuse assignments due to added technology features.
1. Engine Compartment Fuse Box
The primary fuse box is located in the engine bay, mounted near the battery, typically toward the rear corner of the compartment close to the firewall.
How to access it:
- Open the bonnet and locate the black plastic cover near the battery.
- Release the retaining clips along the edges of the cover, most versions use tool-free snap-lock tabs.
- Lift the cover straight up to reveal the fuses and relays inside.
This fuse box protects higher-amperage components such as the headlights, engine cooling fan, horn, and starter relay. Since this area is exposed to engine heat and road moisture, make sure the cover is properly reseated after inspection to prevent corrosion.
2. Interior Fuse Panel (Passenger Compartment Fuse Box)
The cabin fuse box is located inside the vehicle, typically at the end of the dashboard on the driver’s side, near the door.
How to access it:
- Open the driver’s door and locate the small access panel at the end of the dashboard, near the door hinge area.
- Gently pull or unclip the cover, it’s usually secured with simple plastic retaining clips.
- Once removed, you’ll see the fuse layout along with several compact relays.
This panel controls interior circuits such as the SYNC infotainment system, interior lighting, wipers, hazard warning lights, power windows, and central locking system.
3. Additional Relays Near the Battery
Beyond the main engine bay fuse box, certain standalone relays, such as the fuel pump relay, horn relay, or main relay, may be mounted separately near the battery or along the inner wing panel rather than housed within the primary fuse box.
How to access them:
- Inspect the area around the battery and inner wing panel for individually mounted relays plugged into the wiring harness.
- These relays can generally be pulled straight out of their socket for inspection or replacement.
Since these relays aren’t always grouped with the main fuse box, a wiring diagram specific to your Focus’s engine variant (petrol, diesel, or EcoBoost) is helpful for confirming exact locations.
How to Identify the Right Fuse or Relay
The fuse box covers typically include a printed diagram, either on the inside of the lid or on a label near the fuse block, listing each fuse and relay by number, amperage rating, and function.
When troubleshooting:
- Identify the malfunctioning component (e.g., “SYNC system” or “central locking”) and match it to its corresponding number on the diagram.
- Confirm the amperage rating on the old fuse matches the replacement before installing a new one.
- For relays, use a wiring diagram to confirm the correct location and function, since relays can look similar despite controlling different systems.
If the printed diagram is missing or difficult to read, refer to your owner’s manual or a verified fuse box diagram specific to your Focus’s model year and engine variant, as configurations can vary slightly between petrol, diesel, and EcoBoost versions, as well as between trim levels like Zetec, Titanium, or ST-Line.
Safety Precautions Before Checking Fuses or Relays
- Turn off the ignition and remove the key before touching any fuse or relay.
- For more involved electrical work, disconnect the negative battery terminal to prevent accidental short circuits.
- Use a fuse puller tool or needle-nose pliers rather than metal screwdrivers, which can cause sparking.
- Never replace a fuse with one of a higher amperage rating than specified, as this can overload the circuit and create a fire hazard.
- If a replacement fuse blows immediately, stop and inspect the circuit for an underlying short rather than continuing to swap fuses.
- Inspect fuse box connectors and relay sockets periodically for corrosion or wear, especially if the vehicle is frequently exposed to damp conditions.
Passenger compartment
The fuse panel is located on the right side below the glove box.
Engine compartment
The power distribution box is located in the engine compartment.
Luggage compartment
The fuse panel is located in the luggage compartment behind the left side wheel well.
Fuse box diagrams
2015
Passenger compartment
Assignment of the fuses in the Passenger compartment (2015)
| № | Amp Rating | Circuits protected |
|---|---|---|
| F56 | 20A | Fuel pump supply. |
| F57 | – | Not used. |
| F58 | – | Not used. |
| F59 | 5A | Passive anti-theft system supply. |
| F60 | 10A | Interior lamps, driver’s door switch pack, glove box, ambient lighting, electric moonroof. |
| F61 | 20A | Cigar lighter, rear power outlet. |
| F62 | – | Not used. |
| F63 | – | Not used. |
| F64 | – | Not used. |
| F65 | 10A | Luggage compartment lid release. |
| F66 | 20A | Driver’s door lock, double locking. |
| F67 | 7.5 A | Information and entertainment display. Global Positioning System. Bluetooth phone voice control connectivity. |
| F68 | – | Not used. |
| F69 | 5A | Instrument cluster. |
| F70 | 20A | Central locking. |
| F71 | 7.5 A | Air conditioning. |
| F72 | 7.5 A | Steering wheel control module. |
| F73 | 7.5 A | Battery back-up sounder (alarm system). Onboard diagnostics system. |
| F74 | 15A | Main beam. |
| F75 | 15A | Front fog lamps. |
| F76 | 10A | Reversing lamp. |
| F77 | 20A | Washer pump. |
| F78 | 5A | Ignition switch or start button. |
| F79 | 15A | Audio unit, hazard and door lock buttons. |
| F80 | 20A | Electric moonroof. |
| F81 | 5A | Radio frequency receiver. |
| F82 | 20A | Washer pump ground. |
| F83 | 20A | Central locking ground. |
| F84 | 20A | Driver’s door unlock and double locking ground. |
| F85 | 7.5 A | Voltage quality monitoring (KL15). Manual air conditioning heater module. Auxiliary heater. Forward looking camera. Radio. Moonroof module. |
| F86 | 10A | Restraint system. Manual air conditioning heater module. Passenger airbag deactivation system. |
| F87 | 15A | Heated steering wheel. |
| F88 | – | Not used. |
| F89 | – | Not used. |
Engine compartment
Assignment of the fuses in the Power distribution box (2015)
| № | Amp Rating | Circuits protected |
|---|---|---|
| F7 | 40A | Anti-lock Braking System pump. Electronic stability program valve. |
| F8 | 30A | Electronic stability program valve. |
| F9 | 30A | Heated rear window. |
| F10 | 40A | Heater blower motor. |
| F11 | 30 | Start-stop module. |
| F12 | 30A | Engine management systems. Exhaust gas re-circulation relay. |
| F13 | 30A | Starter relay. |
| F14 | 25 | Rear power window (without door control unit). |
| F15 | 25A | Transmission control module. Cooling fan – 1.0L EcoBoost. |
| F16 | – | Not used. |
| F17 | – | Not used. |
| F18 | 20A | Windshield wipers. |
| F19 | 5A | Electronic stability program module. |
| F20 | 15 A | Horn. |
| F21 | 5A | Brake lamp switch. |
| F22 | 15 A | Battery monitoring system. |
| F23 | 5A | Relay coils, lighting control switch module. |
| F24 | 5A | Rear side heated windshield. |
| F25 | 10A | Electric exterior mirrors. |
| F26 | 15 A | Transmission control module – 2.0L GDI. |
| F26 | 20A | Transmission control module – 1.0L Ecoboost. |
| F27 | 15 A | Air conditioning clutch. |
| F28 | – | Not used. |
| F29 | 10A | Stop-start for rear view camera. Blind spot information system. |
| F30 | – | Not used. |
| F31 | – | Not used. |
| F32 | 10A | Powertrain control module. Crankshaft position sensor. Camshaft position sensor. |
| F33 | 15 A | Total mass air flow sensor – 2.0 GDI. Ignition coils – 1.0L EcoBoost. |
| F34 | 10A | Run on water pump. Variable valves. Canister purge valve. |
| F35 | 10A | Crankshaft position sensor. Universal heated exhaust gas oxygen sensor. Canister purge valve. |
| F36 | 5A | Active grille shutter. |
| F37 | 15 A | Daytime running lamps. Headlamp control module |
| F38 | 15 A | Transmission control switch. |
| F39 | – | Not used. |
| F40 | 5A | Electric power assisted steering. |
| F41 | 20A | Body control module KL15 supply. |
| F42 | 15A | Rear window wiper. |
| F43 | 15A | Adaptive headlamps. |
| F44 | – | Not used. |
| F45 | – | Not used. |
| F46 | 25A | Electric windows. |
| F47 | 7.5A | Heated exterior mirrors. |
| F48 | – | Not used. |
| Relay | ||
| R1 | Micro relay | Intercooler fan. |
| R2 | Micro relay | Horn. |
| R3 | Micro relay | Front window defroster (partially heated windscreen). |
| R4 | – | Not used. |
| R5 | Micro relay | Rear wipwer. |
| R6 | – | Not used. |
| R7 | – | Not used. |
| R8 | Power relay | Delayed accessory power. |
| R9 | – | Not used. |
| R10 | Mini relay | Starter relay. |
| R11 | Micro relay | Air conditioning clutch. |
| R12 | Power relay | Cooling fan relay. |
| R13 | Mini relay | Blower motor. |
| R14 | Mini relay | Powertrain control module. |
| R15 | Power relay | Rear window defroster. |
| R16 | Power relay | Ignition. |
Luggage compartment
Assignment of the fuses in the Luggage compartment (2015)
| № | Ampere rating | Circuits protected |
|---|---|---|
| F1 | 5A | Ignition relay. |
| F2 | – | Not used. |
| F3 | 5A | Keyless vehicle door handles. |
| F4 | 25A | Door module (left-hand front) (electric windows, central locking, electric folding mirrors, heated exterior mirrors). |
| F5 | 25A | Door module (right-hand front) (electric windows, central locking, electric folding mirrors, heated exterior mirrors). |
| F6 | 25A | Door module (left-hand rear) (electric windows). |
| F7 | 25A | Door module (right-hand rear) (electric windows). |
| F8 | – | Not used. |
| F9 | 25A | Power driver’s seat. |
| F10 | 25A | Digital signal processing amplifier. |
| F11 | 5A | Keypad switch. |
| F12 | – | Not used. |
| F13 | – | Not used. |
| F14 | – | Not used. |
| F15 | – | Not used. |
| F16 | – | Not used. |
| F17 | – | Not used. |
| F18 | – | Not used. |
| F19 | – | Not used. |
| F20 | – | Not used. |
| F21 | – | Not used. |
| F22 | – | Not used. |
| F23 | – | Not used. |
| F24 | – | Not used. |
| F25 | – | Not used. |
| F26 | – | Not used. |
| F27 | – | Not used. |
| F28 | – | Not used. |
| F29 | 5A | Blind spot monitor. Rear view camera without start stop module. |
| F30 | 5A | Parking aid module. |
| F31 | – | Not used. |
| F32 | – | Not used. |
| F33 | – | Not used. |
| F34 | 15 A | Heated driver’s seat. |
| F35 | 15 A | Heated front passenger’s seat. |
| F36 | – | Not used. |
| F37 | – | Not used. |
| F38 | – | Not used. |
| F39 | – | Not used. |
| F40 | – | Not used. |
| F41 | – | Not used. |
| F42 | – | Not used. |
| F43 | – | Not used. |
| F44 | – | Not used. |
| F45 | – | Not used. |
| F46 | – | Not used. |
| Relay | ||
| R1 | Power relay | Ignition switch. |
| R2 | – | Not used. |
| R3 | – | Not used. |
| R4 | – | Not used. |
| R5 | – | Not used. |
| R6 | – | Not used. |
2016, 2017
Passenger compartment
Assignment of the fuses in the Passenger compartment (2016, 2017)
| № | Ampere rating | Circuits protected |
|---|---|---|
| F56 | 20A | Fuel pump supply. |
| F57 | – | Not used. |
| F58 | – | Not used. |
| F59 | 5A | Passive anti-theft system supply. |
| F60 | 10A | Interior lamps, driver’s door switch pack, glove box, ambient lighting, electric moonroof. |
| F61 | 20A | Front cigar lighter. 2nd row power point. |
| F62 | – | Not used. |
| F63 | – | Not used. |
| F64 | – | Not used. |
| F65 | 10A | Luggage compartment lid release. |
| F66 | 20A | Driver’s door lock. |
| F67 | 7.5 A | Information and entertainment display. Global Positioning System. SYNC module. |
| F68 | – | Not used. |
| F69 | 5A | Instrument cluster. |
| F70 | 20A | Central locking. |
| F71 | 7.5 A | Air conditioning. |
| F72 | 7.5 A | Steering wheel control module. |
| F73 | 7.5 A | Battery back-up sounder (alarm system). Onboard diagnostics system. |
| F74 | 15A | Headlamp unit (main beam). |
| F75 | 15A | Front fog lamps. |
| F76 | 10A | Reversing lamp. |
| F77 | 20A | Washer pump. |
| F78 | 5A | Ignition switch or start button. |
| F79 | 15A | Audio unit, hazard and door lock buttons. |
| F80 | 20A | Electric moonroof. |
| F81 | 5A | Radio frequency receiver. |
| F82 | 20A | Washer pump ground. |
| F83 | 20A | Central locking ground. |
| F84 | 20A | Driver’s door unlock ground. |
| F85 | 7.5 A | Voltage quality monitoring (KL15). Manual air conditioning heater module. Forward looking camera. Radio. Moonroof module. |
| F86 | 10A | Restraint system. Occupant weight sensor. |
| F87 | 15A | Heated steering wheel. |
| F88 | – | Not used. |
| F89 | – | Not used. |
Engine compartment
Assignment of the fuses in the Power distribution box (2016, 2017)
| № | Ampere rating | Circuits protected |
|---|---|---|
| F7 | 40A | Anti-lock Braking System pump. Traction control valve. |
| F8 | 30A | Traction control valve. |
| F9 | 30A | Heated rear window. |
| F10 | 40A | Heater blower motor. |
| F11 | 30A | Start-stop module. |
| F12 | 30A | Engine management systems. Exhaust gas re-circulation relay. |
| F13 | 30A | Starter motor. |
| F14 | 25A | Rear power window (without door control unit). |
| F15 | 25A | Transmission control module. Cooling fan – 1.0L EcoBoost. |
| F16 | – | Not used. |
| F17 | – | Not used. |
| F18 | 20A | Windshield wipers. |
| F19 | 5A | Traction control module. |
| F20 | 15A | Horn. |
| F21 | 5A | Brake lamp switch. |
| F22 | 15 A | Battery monitoring system. |
| F23 | 5A | Relay coils, lighting control switch module. |
| F24 | 5A | Right-hand partially heated windshield element. |
| F25 | 10A | Electric exterior mirrors (without door control unit). |
| F26 | 15A | Transmission control module – 2.0L GDI. |
| F26 | 20A | Transmission control module – 1.0L Ecoboost. |
| F27 | 15 A | Air conditioning clutch. |
| F28 | – | Not used. |
| F29 | 10A | Stop-start. |
| F30 | – | Not used. |
| F31 | – | Not used. |
| F32 | 10A | Powertrain control module. Crankshaft position sensor. Camshaft position sensor. |
| F33 | 15 A | Total mass air flow sensor – 2.0 GDI. Ignition coils – 1.0L EcoBoost. |
| F34 | 10A | Run on water pump. Variable valves. Canister purge valve. |
| F35 | 10A | Crankshaft position sensor. Universal heated exhaust gas oxygen sensor. Canister purge valve. |
| F36 | 5A | Active grille shutter. |
| F37 | 15 A | Daytime running lamps. Headlamp control module |
| F38 | 15 A | Transmission control module global shifter (switched battery power). |
| F39 | 15 A | Heated driver seat. |
| F40 | 5A | Electric power assisted steering. |
| F41 | 20A | Body control module KL15 supply. |
| F42 | 15 A | Rear wiper motor. |
| F43 | 15 A | Headlamp unit (dynamic bending motor). |
| F44 | – | Not used. |
| F45 | 15 A | Heated passenger seat. |
| F46 | 25A | Electric power windows (without door control unit). |
| F47 | 7.5 A | Heated exterior mirrors (without door control unit). |
| F48 | – | Not used. |
| Relay | ||
| R1 | Micro relay | Intercooler fan. |
| R2 | Micro relay | Horn. |
| R3 | Micro relay | Front window defroster (partially heated windscreen). |
| R4 | – | Not used. |
| R5 | Micro relay | Rear wiper. |
| R6 | – | Not used. |
| R7 | – | Not used. |
| R8 | Power relay | Delayed accessory power. |
| R9 | – | Not used. |
| R10 | Mini relay | Starter relay. |
| R11 | Micro relay | Air conditioning clutch. |
| R12 | Power relay | Cooling fan relay. |
| R13 | Mini relay | Blower motor. |
| R14 | Mini relay | Powertrain control module. |
| R15 | Power relay | Rear window defroster. |
| R16 | Power relay | Ignition. |
Luggage compartment
Assignment of the fuses in the Luggage compartment (2016, 2017)
| № | Ampere rating | Circuits protected |
|---|---|---|
| F1 | 5A | Ignition relay. |
| F2 | – | Not used. |
| F3 | 5A | Keyless vehicle door handles. |
| F4 | 25A | Door module (left-hand front) (electric windows, central locking, heated exterior mirrors). |
| F5 | 25A | Door module (right-hand front) (electric windows, central locking, heated exterior mirrors). |
| F6 | 25A | Door module (left-hand rear) (electric windows). |
| F7 | 25A | Door module (right-hand rear) (electric windows). |
| F8 | – | Not used. |
| F9 | 25A | Power driver’s seat adjust. |
| F10 | 25A | Digital signal processing amplifier. |
| F11 | 5A | Keypad switch. |
| F12 | – | Not used. |
| F13 | – | Not used. |
| F14 | – | Not used. |
| F15 | – | Not used. |
| F16 | – | Not used. |
| F17 | – | Not used. |
| F18 | – | Not used. |
| F19 | – | Not used. |
| F20 | – | Not used. |
| F21 | – | Not used. |
| F22 | – | Not used. |
| F23 | – | Not used. |
| F24 | – | Not used. |
| F25 | – | Not used. |
| F26 | – | Not used. |
| F27 | – | Not used. |
| F28 | – | Not used. |
| F29 | 5A | Blind spot monitor. Rear view camera without start stop module. |
| F30 | 5A | Parking aid module. |
| F31 | – | Not used. |
| F32 | – | Not used. |
| F33 | – | Not used. |
| F34 | – | Not used. |
| F35 | – | Not used. |
| F36 | – | Not used. |
| F37 | – | Not used. |
| F38 | – | Not used. |
| F39 | – | Not used. |
| F40 | – | Not used. |
| F41 | – | Not used. |
| F42 | – | Not used. |
| F43 | – | Not used. |
| F44 | – | Not used. |
| F45 | – | Not used. |
| F46 | – | Not used. |
| Relay | ||
| R1 | Power relay | Ignition switch. |
| R2 | – | Not used. |
| R3 | – | Not used. |
| R4 | – | Not used. |
| R5 | – | Not used. |
| R6 | – | Not used. |
2018
Passenger compartment
Assignment of the fuses in the Passenger compartment (2018)
| № | Amp Rating | Protected Component |
|---|---|---|
| F56 | 20 A | Fuel pump. |
| F57 | – | Not used. |
| F58 | 5 A | Not used (spare). |
| F59 | 5 A | Passive anti-theft system. |
| F60 | 10 A | Interior lamp. Ambient lighting module. Moonroof. left-hand front door module. |
| F61 | 20 A | Cigar lighter. Rear auxiliary power points. |
| F62 | 5 A | Not used (spare). |
| F63 | 10 A | Not used (spare). |
| F64 | – | Not used. |
| F65 | 10 A | Liftgate release switch. |
| F66 | 20 A | Driver door lock. |
| F67 | 7.5 A | Information and entertainment display. Global positioning system module. SYNC module. |
| F68 | – | Not used. |
| F69 | 5 A | Instrument cluster. |
| F70 | 20 A | Central locking system. |
| F71 | 7.5 A | Air conditioning control module. |
| F72 | 7.5 A | Steering wheel module. |
| F73 | 7.5 A | Battery back-up sounder. Secondary on-board diagnostic control module A. |
| F74 | 15 A | Headlamp high beam. |
| F75 | 15 A | Front fog lamps. |
| F76 | 10 A | Reversing lamp. |
| F77 | 20 A | Windshield washer pump. Rear window washer pump. |
| F78 | 5 A | Push button ignition switch. |
| F79 | 15 A | Audio unit. Hazard flasher switch. Power door locks. |
| F80 | 20 A | Moonroof. |
| F81 | 5 A | Radio frequency receiver. |
| F82 | 20 A | Windshield washer pump. Rear window washer pump. |
| F83 | 20 A | Tracking and blocking control module. |
| F84 | 20 A | Driver door unlock. |
| F85 | 7.5 A | Voltage quality monitoring. Air conditioning clutch. Front parking aid camera. Audio unit. Moonroof. |
| F86 | 10 A | Supplemental restraint system. Passenger sensing system. |
| F87 | 15 A | Heated steering wheel. |
| F88 | – | Not used. |
| F89 | – | Not used. |
Engine compartment
Assignment of the fuses in the Power distribution box (2018)
| № | Amp Rating | Protected Component |
|---|---|---|
| F7 | 40 A | Anti-lock brake system. Traction control valve. |
| F8 | 30 A | Traction control valve. |
| F9 | 30 A | Heated rear window. |
| F10 | 40 A | Blower motor. |
| F11 | 30 A | Auto-start-stop. |
| F12 | 30 A | Powertrain control module relay. |
| F13 | 30 A | Starter motor. |
| F14 | 25 A | Rear power windows. |
| F15 | 25 A | Transmission control module. Cooling fan (1.0L EcoBoost). |
| F16 | 20 A | Battery monitoring sensor. |
| F17 | – | Not used. |
| F18 | 20 A | Windshield wipers. |
| F19 | 5 A | Traction control module. |
| F20 | 15 A | Horn. |
| F21 | 5 A | Stoplamp switch. |
| F22 | 5 A | Parking assist control module. |
| F23 | 5 A | A/C compressor relay coils. Lighting control. |
| F24 | 5 A | Right-hand heated windshield element. |
| F25 | 10 A | Exterior mirrors. |
| F26 | 15 A | Transmission control module (2.0L GDI). |
| F26 | 20 A | Transmission control module (1.0L Ecoboost). |
| F27 | 15 A | Air conditioning clutch. |
| F28 | 5 A | Rearview camera. |
| F29 | 10 A | Auto-stop-start. |
| F30 | – | Not used. |
| F31 | 5 A | Accessory delay. |
| F32 | 10 A | Powertrain control module. Crankshaft position sensor. Camshaft position sensor. |
| F33 | 15 A | Mass air flow sensor (2.0 GDI). Ignition coil (1.0L EcoBoost). |
| F34 | 10 A | Coolant pump. Evaporative emission canister purge valve. Sound symposer actuator valve. Turbocharger bypass valve. Wastegate control valve. Air conditioning compressor. Oil pump. Turbocharger variable vane hydraulic control valve. Variable intake valve. Externally-controlled variable displacement compressor. |
| F35 | 10 A | Crankshaft position sensor. Heated oxygen sensor. Evaporative emission canister purge valve. |
| F36 | 5 A | Active grille shutter. |
| F37 | 15 A | Daytime running lamps. Headlamp control module. |
| F38 | 15 A | Transmission control module. |
| F39 | 15 A | Driver heated seat. |
| F40 | 5 A | Electronic power assist steering. |
| F41 | 20 A | Body control module. |
| F42 | 15 A | Rear window wiper motor. |
| F43 | 15 A | Headlamps. |
| F44 | – | Not used. |
| F45 | 15 A | Passenger heated seat. |
| F46 | 25 A | Power windows. |
| F47 | 7.5 A | Heated exterior mirrors. |
| F48 | – | Not used. |
| Relay Number | ||
| R1 | Cooling fan. | |
| R2 | Horn. | |
| R3 | Heated windshield relay. | |
| R4 | Not used. | |
| R5 | Rear window wiper. | |
| R6 | Not used. | |
| R7 | Accessory delay. | |
| R8 | Accessory delay. | |
| R9 | Not used. | |
| R10 | Starter relay. | |
| R11 | Air conditioning clutch. | |
| R12 | Cooling fan relay. | |
| R13 | Blower motor. | |
| R14 | Powertrain control module. | |
| R15 | Rear window defroster. | |
| R16 | Ignition. |
Luggage compartment
Assignment of the fuses in the Luggage compartment (2018)
| № | Amp Rating | Protected Component |
|---|---|---|
| F1 | – | Not used. |
| F2 | – | Not used. |
| F3 | 5 A | Remote keyless entry. |
| F4 | 25 A | Left-hand front power windows. Central locking system. Left-hand heated exterior mirror. |
| F5 | 25 A | Right-hand front power windows. Central locking system. Right-hand heated exterior mirror. |
| F6 | 25 A | Left-hand rear-window power. |
| F7 | 25 A | Right-hand rear power windows. |
| F8 | – | Not used. |
| F9 | 25 A | Driver power seat. |
| F10 | 25 A | Audio unit antenna amplifier. |
| F11 | 5 A | Remote keyless entry. |
| F12 | – | Not used. |
| F13 | – | Not used. |
| F14 | – | Not used. |
| F15 | – | Not used. |
| F16 | – | Not used. |
| F17 | – | Not used. |
| F18 | – | Not used. |
| F19 | – | Not used. |
| F20 | – | Not used. |
| F21 | – | Not used. |
| F22 | – | Not used. |
| F23 | – | Not used. |
| F24 | – | Not used. |
| F25 | – | Not used. |
| F26 | – | Not used. |
| F27 | – | Not used. |
| F28 | – | Not used. |
| F29 | – | Not used. |
| F30 | – | Not used. |
| F31 | – | Not used. |
| F32 | – | Not used. |
| F33 | – | Not used. |
| F34 | – | Not used. |
| F35 | – | Not used. |
| F36 | – | Not used. |
| F37 | – | Not used. |
| F38 | – | Not used. |
| F39 | – | Not used. |
| F40 | – | Not used. |
| F41 | – | Not used. |
| F42 | – | Not used. |
| F43 | – | Not used. |
| F44 | – | Not used. |
| F45 | – | Not used. |
| F46 | – | Not used. |
| Relay Number | ||
| R1 | Not used. | |
| R2 | Not used. | |
| R3 | Not used. | |
| R4 | Not used. | |
| R5 | Not used. | |
| R6 | Not used. |
Conclusion
Knowing the fuse box and relay locations on your 2015–2018 Ford Focus (C346) makes it much easier to handle minor electrical issues without unnecessary guesswork. With two main fuse box locations, one under the bonnet and one inside the cabin, plus a few standalone relays near the battery, this Focus generation is relatively simple to troubleshoot once you’re familiar with its layout.
Always handle fuses and relays with care, confirm amperage ratings before replacing any component, and use the printed diagram or a wiring reference to correctly identify each fuse or relay. If an electrical issue persists after replacing a fuse, or if you’re unsure about diagnosing the problem yourself, consulting a mechanic experienced with European Ford Focus models is a smart next step.
