The 3rd generation Ford Focus was produced in 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 with sedan, hatchback, station wagon bodies and was supplied to the markets of more than 122 countries. This model was restyled in 2014. In our material, we will show where the 3rd generation Ford Focus fuse and relay boxes are located, their designation with boxes diagrams and photographs. Separately, we highlight the fuse responsible for the cigarette lighter. We will also show the general location of all electronic control units.
The purpose of the fuses may differ from the one presented and depends on the year of manufacture, equipment level and country of delivery Ford Focus 3. And if the generation of the model is not suitable, study other descriptions: focus 1 and focus 2 .
Contents
Block arrangement
This diagram will show the general location of all electronic control units in the Ford Focus 3.
Diagram
Assignment
| 1 | ABS electronic control unit |
| 2 | Air conditioner electronic control unit |
| 3 | Anti-theft alarm horn – on the right side of the luggage compartment |
| 4 | Audio interface control unit |
| 5 | Accumulator battery |
| 6 | Diagnostic connector (DLC) |
| 7 | DC / DC converter control unit |
| 8 | Driver’s door control unit |
| 9 | Rear left door electrical control unit |
| 10 | Passenger door electrical control unit |
| 11 | Rear right door electrical control unit |
| 12 | Electronic engine control unit (ECM) – behind the left wheel arch trim |
| 13 | Cooling fan motor control unit |
| 14 | Cooling system radiator flap control unit |
| 15 | Fuse / relay box, engine compartment 1 |
| 16 | Fuse / relay box, engine compartment 2 |
| 17 | Fuse / relay box, instrument panel |
| 18 | Fuse / relay box, luggage compartment – left side of luggage compartment |
| 19 | Glow plug control unit – behind the left wheel arch trim |
| 20 | Headlamp control unit |
| 21 | Heater blower motor resistor – next to blower motor |
| 22 | Beep 1 |
| 23 | Beep 2 |
| 24 | Ignition switch control unit |
| 25 | Instrument Cluster Interface Control Unit |
| 26 | Instrument cluster control unit |
| 27 | Remote control unit for central locking and engine start |
| 28 | Lane tracking control unit |
Ford Focus 3 has 3 main boxes with fuses and relays: in the cabin, under the hood and in the luggage compartment.
Passenger compartment
It is located under the dashboard, on the passenger side, behind the glove compartment, and is covered with trim.
Photo for example
Diagram
Assignment
| 56 | 20A Fuel pump |
| 57 | Reserve |
| 58 | Reserve |
| 59 | 5A Transceiver passive anti-theft system |
| 60 | 10A Interior lighting, driver’s door control unit, glove box lighting, background lighting, overhead control unit, sunroof |
| 61 | 20A Cigarette lighter, rear socket |
| 62 | 5A Rain sensor, humidity sensor, auto-dimming interior mirror |
| 63 | 10A Europe: Adaptive cruise control system |
| 64 | Reserve |
| 65 | 10A Power tailgate latch release |
| 66 | 20A Driver’s door lock, double lock |
| 67 | 7.5A Infotainment Display, SYNC Module, GPS Module, Compass, BVC |
| 68 | 15A Electric steering column lock |
| 69 | 5A Instrument cluster |
| 70 | 20A Central locking |
| 71 | 7.5 / 10A Air conditioning system, Heater control unit (mechanical air conditioner), dual-zone climate control |
| 72 | 7.5A Steering wheel module |
| 73 | 5 / 7.5A Diagnostic connector, battery of the anti-theft alarm siren |
| 74 | 15A High beam headlights |
| 75 | 15A Front fog light |
| 76 | 10A Reversing lamps |
| 77 | 20A Windshield washer, rear window washer |
| 78 | 5A Ignition switch, start button, keyless entry / start system |
| 79 | 15A Hazard switch, audio system, navigation, DVD player, door lock switch |
| 80 | 20A Sunroof, sunblind |
| 81 | 5A Interior control sensor, RF radio receiver |
| 82 | 20A Glass washer pump |
| 83 | 20A Central locking |
| 84 | 20A Unlock driver’s door, double lock |
| 85 | 7.5A Radio, navigation, passenger airbag deployment switch, seat heating switch, parking heater, heater control unit (mechanical air conditioner), auxiliary heater, sunroof, air quality sensor, car temperature and humidity sensor, voltage quality control, front camera |
| 86 | 10A Airbag and seatbelt system control module, passenger presence recognition system, passenger airbag indicator, air conditioning system (mechanical air conditioning) |
| 87 | 15A Heated steering wheel |
| 88 | 25A Voltage quality module |
| 89 | – |
The fuse number 61, 20A, is responsible for the cigarette lighter.
Engine compartment
Block layout example
Mounting box
It is located on the left side of the engine compartment and is covered by a protective cover, on the back of which the current block diagram will be applied.
Diagram
Designation
| 7 | 40А ABS, ESP |
| 8 | 30А ESP |
| 9 | 30A Heated rear window 40A Luggage compartment fuse box |
| 10 | 40A Heater motor |
| 11 | 30A Voltage quality module, Start-stop system |
| 12 | 30A Relay engine control valve EGR valve |
| 13 | 30A Starter relay |
| 14 | 40A Heated windshield (right side) 25A Rear power window |
| 15 | 25A Cooling fan, transmission control unit |
| 16 | 40A Heated windshield (left side) 20A Battery sensor |
| 17 | 20A Auxiliary heater |
| 18 | 20A Windshield wiper |
| 19 | 5А ABS, ESP |
| 20 | 15A Sound signal |
| 21 | 5A Brake light switch |
| 22 | 15A Battery Monitoring System 5A Parking Assistant |
| 23 | 5A Coil relay, light switch |
| 24 | 20A Rear outlet 5A Heated windshield (right side) |
| 25 | 10A Power mirrors |
| 26 | 15/20 / 25A Transmission control unit |
| 27 | 15A Air Conditioning Compressor Clutch |
| 28 | 5A MAF Sensor, Rear Camera, Adaptive Cruise Control 10A Rear View Camera, Collision Warning System |
| 29 | 20A Headlight washers 10A Rearview camera, collision warning system |
| 30 | 5A Engine control unit |
| 31 | 15A Intercooler Fan (1.6L Duratorq TDCi) |
| 32 | 10A Exhaust Gas Recirculation Valve, Swirl Control Valves, Heated Exhaust Gas Oxygen Sensor (Engine Control Systems), Fan ECM Relay (Coil) |
| 33 | 10A Ignition coils |
| 34 | 10A Injectors, cooling system pump, adsorber purge valve |
| 35 | 5 / 15A Active radiator shutters, Heated fuel filter (diesel engines), Water-in-fuel sensor, ECU, ignition coils |
| 36 | 10A Engine control unit 5A Active radiator shutters |
| 37 | 5A ABS 15A Daytime running lights, headlamp control unit 20A Additional socket on the dashboard |
| 38 | 15A Engine control unit, transmission control unit |
| 39 | 5A Headlamp control unit 15A Power driver’s seat |
| 40 | 5A Power steering |
| 41 | 20A Body electronics unit |
| 42 | 15A Rear wiper |
| 43 | 15A Headlight range control, adaptive lighting |
| 44 | 5A Adaptive cruise control |
| 45 | 10A Heated washer jets 15A Electric passenger seat |
| 46 | 25A Front power windows or Cooling fan |
| 47 | 7.5A Heated mirrors |
| 48 | 15A Diesel flue gas filter evaporator 5A Electric mirrors |
For additional sockets, fuses 24 and 37 at 20A can also be responsible.
Relay
| R1 | Intercooler fan |
| R2 | Sound signal |
| R3 | Diesel flue gas filter evaporator or 14-18: Heated windscreen |
| R4 | Reserve |
| R5 | Rear wiper |
| R6 | Cooling fan |
| R7 | Heated windshield |
| R8 | Cooling fan |
| R9 | Headlight washers |
| R10 | Cooling fan, Starter |
| R11 | A / C Compressor Clutch |
| R12 | Cooling fan |
| R13 | Heater motor |
| R14 | The engine control unit |
| R15 | Starter, Heated rear window |
| R16 | Ignition |
Power fuse box
It is in the form of high power fusible links and is located in the battery cover.
Diagram
Appointment
- F1 (80A) Power steering control unit
- F2 (150A) Starter
- F3 (100A)
- F4 (50A) Multifunction control module
- F5 (80A) Additional heater
- F6 (70A)
- F7 –
- F8 (50A) Cooling fan motor control unit
- F9 (50A) Multifunction control module
- F10 (60A) Glow plug control unit
Luggage compartment
Located behind the casing or protective cover.
Photo for example
Diagram
Assignment
| 1 | 5A Coil Relay |
| 2 | 10A Vehicle Keyless System Module |
| 3 | 5A Door handles in vehicles with a keyless entry system |
| 4 | 25A Door module (front left) (power window, central locking, electric folding mirrors, heated mirrors) |
| 5 | 25A Door module (front right) (power window, central locking, electric folding mirrors, heated mirrors) |
| 6 | 25A Door module (rear left) (power window) |
| 7 | 25A Door module (rear right) (power window) |
| 8 | 10A Europe: Anti-theft alarm siren |
| 9 | 25A Power driver’s seat |
| 10 | Windows, ’14 -’18: Audio amplifier |
| 11 | 5A Vehicle Keyless System Module, 25A Power Passenger Seat |
| 12 | 10A Air conditioning system module (with start and stop module) |
| 13 | 5A Instrument cluster (with start and stop module) |
| 14 | 7.5A Display of the infotainment system, GPS module (with start and stop module) |
| 15 | 15A Audio system (with start and stop module) |
| 16 | – |
| 17 | – |
| 18 | – |
| 19 | – |
| 20 | – |
| 21 | – |
| 22 | – |
| 23 | 25A Audio amplifier |
| 24 | 30A Heated rear window |
| 25 | 20A Socket in the luggage compartment |
| 26 | 40A Trailer module |
| 27 | – |
| 28 | 40A Trailer module |
| 29 | 5A Monitoring system for unvisited zones, monitoring system for observing road markings, Active City Stop system, rear view camera |
| 30 | 5A Parking aid module |
| 31 | – |
| 32 | – |
| 33 | 15A Rear wiper relay |
| 34 | 15A Heated driver’s seat |
| 35 | 15A Heated passenger seat |
| 36 | – |
| 37 | 5A Luke |
| 38 | – |
| 39 | – |
| 40 | – |
| 41 | 5A Sliding towing device |
| 42 | – |
| 43 | – |
| 44 | 10A Power mirrors |
| 45 | 7.5A Heated mirrors |
| 46 | 5A Monitoring system for non-visible areas, monitoring system for compliance with road markings, rear view camera (with engine start / stop system) |
| Relay | |
| R1 | Egnition lock |
| R2 | Heated rear window |
| R3 | Rear wiper |
| R4 | – |
| R5 | Anti-theft alarm siren |
| R6 | Auxiliary relay |
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If you have any questions, ask them in the comments.
Should I plug my add fuse in the luggage compartment fuse box in slot 15 audio system with ( start stop module) for my after market amp’s remote wire if I only want my amp on when car acc is on
Hey, I figure you might still need some insight since no replies here.
Im in the process of installing an active subwoofer under the seat, somewhat similar to your situation.
GND is obvious, I hope. Find a point on the chassis where you connect through a screw etc.
Power 12V+: Based on the power requirements, the wattage of your amp you need either a direct line from the battery with a suitable fuse in line or if lets say below 100W at max/peak performance, low enough (my sub is 50W nominal) you can try to piggy back a fuse which has reserve, but never replace the original fuse with a stronger one or you might blow something more important(and expensive). With higher power comes higher risk of blowing something, so a direct line is your best bet, assuming the amp is of the serious oomph kind and probably above 200W.
Remote: your head unit should have an amp remote, amp power, amp ctrl wire/connection(my android has a bunch of RCA), you should connect the remote wire there. So when the head unit turns on it will also switch the amp.
Not talking from experience since I havent done the install yet, but this is what I understood doing my research. Good luck