Ford Focus (2004 – 2010) – fuse box diagram
Year of production: 2004, 2005, 2006, 2007, 2008, 2009, 2010
Passenger Compartment Fuse Box (2004-2007)

| No. | A | Protected components |
| 37 | 10 | Left-hand headlight (high beam) |
| 38 | 10 | Right-hand headlight (high beam) |
| 39 | 20 | Cigar lighter, rear auxiliary power socket |
| 40 | 20 | Sliding roof |
| 41 | 20 | Door module (passenger door) |
| 42 | 7.5 | Outside rear view mirror defoggers |
| 43 | 10 | Electronic modules (battery supply) |
| 44 | 10 | OBD II (board computer diagnostics) |
| 45 | 10 | Daytime running lights |
| 46 | 10 | Instrument cluster, GEM module |
| 47 | 15 | Washer pump, heated washer nozzles |
| 48 | 20 | Low beam headlights, daytime running lights |
| 49 | 15 | Headlight switch |
| 50 | 20 | Windshield wiper |
| 51 | 15 | Fuel pump |
| 52 | 25 | Rear window defroster |
| 53 | 7.5 | Parking lamps, side lamps, tail lamps (left-hand side) |
| 54 | 7.5 | Parking lamps, side lamps, tail lamps (right-hand side) |
| 55 | 20 | Door module (driver door), central locking system |
| 56 | 20 | Keyless entry system |
| 57 | 10 | Alarm horn |
| 58 | 15 | Audio modules (battery supply) |
| 59 | 25 | Luggage compartment auxiliary power socket, trailer tow module |
| 60 | 15 | Right-hand headlight (low beam) |
| 61 | 15 | Left-hand headlight (low beam) |
| 62 | 20 | Power seat (driver side) |
| 63 | 25 | Power windows |
| 64 | – | Not used |
| 65 | 10 | Airbag module |
| 66 | 7.5 | Headlight adjustment switch, low beam headlights, xenon module |
| 67 | 10 | Immobilizer module (WFS), instrument cluster (ignition supply) |
| 68 | 7.5 | Radio, instrument cluster |
| 69 | 20 | Fog light |
| 70 | 10 | Electronic modules (ignition supply) |
| 71 | 10 | Daytime running lights |
| 72 | 25 | GEM |
| 73 | 7.5 | Number plate lights |
| 74 | 15 | Stop light |
| 75 | 10 | Transmission control module, accelerator pedal |
| 76 | 7.5 | Electric parking brake (EPB) |
| 77 | 25 | Central locking relays |
| 78 | 15 | Rear window wiper |
| 79 | 15 | Folding mirror |
| 80 | 10 | Interior lights, outside rear view mirrors |
| 81 | 20 | Door module (right-hand rear) |
| 82 | 20 | Door module (left-hand rear) |
| 83 | 10 | CD-changer, rear seat entertainment (RSE) |
| 84 | 10 | Back-up light, trailer tow module |
| 85 | 10 | Cooling system |
| 86 | 20 | Seat heater |
| Relay | ||
| K1 | Rear window defroster | |
| K4 | Fuel pump | |
| K5 | Daytime running lights | |
Passenger Compartment Fuse Box (2007-2010)

| No. | A | Protected components |
| 100 | 10 | Electronic modules ignition supply |
| 101 | 20 | Electric sunroof control module, driver’s electric seat, |
| 102 | 10 | Heater control, steering column, diesel particulate filter, remote control receiver |
| 103 | 10 | Lighting control battery supply |
| 104 | 10 | Battery saver, interior lamps |
| 105 | 25 | Heated rear window |
| 106 | 20 | Keyless system |
| 107 | 10 | Instrument cluster battery supply, on-board diagnostics |
| 108 | 7.5 | Accessory to cluster (audio and navigation unit) |
| 109 | 20 | Cigar lighter, rear auxiliary power socket |
| 110 | 10 | Daytime running lights ignition supply to lighting control switch |
| 111 | 15 | Fuel pump (petrol engine only) |
| 112 | 15 | Audio modules battery supply |
| 113 | 10 | Daytime running lights (parking lamps) |
| 114 | 10 | Instrument cluster ignition supply, engine immobiliser |
| 115 | 7.5 | Lighting control ignition supply |
| 116 | 20 | Fog lamps |
| 117 | 7.5 | Number plate lamps |
| 118 | 20 | Door module, left-hand rear |
| 119 | 15 | Luggage compartment auxiliary power socket |
| 119 | 25 | Luggage compartment auxiliary power socket (vehicles with trailer tow module) |
| 120 | 20 | Door module, right-hand rear |
| 121 | 20 | Heated front seats |
| 122 | 10 | Airbag module |
| 123 | 7.5 | Heated exterior mirrors |
| 124 | 7.5 | Parking lamps, side lamps, tail lamps (left-hand side) |
| 125 | 7.5 | Parking lamps, side lamps, tail lamps (right-hand side) |
| 126 | 20 | Keyless system |
| 127 | 25 | Electric windows |
| 128 | – | Not used |
| 129 | 20 | Windscreen wipers |
| 130 | – | Not used |
| 131 | 15 | Rear window wiper |
| 132 | 15 | Brake lamps |
| 133 | 25 | Central locking relays, passenger door module |
| 134 | 20 | Central locking, driver door module |
| 135 | 20 | Daytime running lights |
| 136 | 15 | Washer pump, heated washer jets |
| 137 | 10 | Battery backup sounder |
| 138 | 10 | Powertrain control module, accelerator pedal, automatic transmission |
| 139 | 10 | Right-hand headlight (high beam) |
| 140 | 10 | Left-hand headlight (high beam) |
| 141 | 10 | Reversing lamp, electric mirrors |
| 142 | 15 | Right-hand headlight (low beam) |
| 143 | 15 | Left-hand headlight (low beam) |
| Relay | ||
| R1 | Fuel pump | |
| R2 | Not used | |
Engine Compartment Fuse Box

| No. | A | Protected components |
| 1 | 60 | 2004-2007: Cooling fan |
| 40 | 2007-2010: Cooling fan | |
| 2 | 80 | Power steering |
| 3 | 60 | Passenger compartment fuse box supply 1 |
| 4 | 60 | Passenger compartment fuse box supply 2 |
| 5 | 80 | Auxiliary heater |
| 6 | 60 | Diesel: Glow plug |
| 7 | 30 | ABS, stability control pump |
| 8 | 20 | ABS, stability control valves |
| 9 | 20 | Powertrain control module |
| 10 | 30 | Climate control blower |
| 11 | 20 | Ignition switch |
| 12 | 40 | Ignition relay 15l |
| 13 | 20 | Starter solenoid |
| 14 | 40 | Heated windscreen, right-hand side |
| 15 | 30 | Cooling fan relay (Sigma – non A/C only) |
| 16 | 40 | Heated windscreen, left-hand side |
| 17 | 30 | Electric parking brake |
| 18 | 30 | Power inverter |
| 19 | 10 | ABS module |
| 20 | 15 | Horn |
| 21 | 20 | Diesel: Auxiliary heater |
| 22 | 10 | Power steering module |
| 23 | 30 | Headlamp washer |
| 24 | 15 | Diesel: Pre-heating |
| 25 | 10 | Ignition, relays |
| 26 | 10 | 2004-2007: Automatic transmission |
| 15 | 2007-2010: Automatic transmission | |
| 10 | ST, RS: PCM continuous supply | |
| 27 | 10 | Air conditioning clutch |
| 28 | 10 | Diesel: Glow plug monitoring |
| 29 | 10 | Dual zone climate control |
| 30 | 3 | Powertrain control module, automatic transmission |
| 31 | 10 | Battery sensor smart charging |
| 32 | 10 | 2004-2007: 16V+VCT: Ventilation |
| 10 | 2007-2010: Automatic transmission | |
| 10 | ST, RS: Fuel injector power supply | |
| 33 | 10 | Petrol: Heated oxygen sensors |
| 10 | Diesel: Intercooler bypass valve | |
| 20 | ST, RS: Heated oxygen sensor | |
| 34 | 10 | Petrol: Injectors, ignition transformers |
| 10 | 2004-2007: Diesel: Fuel pump |
|
| 35 | 10 | Powertrain control module, valves, solenoids |
| 36 | 10 | Powertrain control module |
| Relay | ||
| R1 | Start lock (automatic transmission) | |
| R2 | Horn | |
| R3 | Back-up light (automatic transmission) | |
| R4 | – | |
| R5 | Diesel: Pre-heating 16V+VCT: Ventilation |
|
| R6 | Main | |
| R7 | Heated windscreen | |
| R8 | Ignition | |
| R9 | Headlamp washer | |
| R10 | Heater blower | |
| R11 | Air conditioning | |
| R12 | Cooling fan (without air conditioning) | |
| R13 | Starter | |
| R14 | Power hold Cooling fan |
|
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
