Ford Focus Fuse Box: What Each Fuse Does
From the 2018 Ford Focus owner's manual. 3 fuse boxes listed.
Engine Compartment Fuse Box
| Fuse | Amps | Circuit |
|---|---|---|
| F7 | 40 A | Anti-lock brake system. |
| F8 | 30 A | Traction control valve. 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. |
| F16 | 20 A | Cooling fan (1.0L EcoBoost). 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. |
| F24 | 5 A | Lighting control. Right-hand heated windshield element. |
| F25 | 10 A | Exterior mirrors. |
| F27 | 15 A | Air conditioning clutch. |
| F28 | 5 A | Rear view camera. |
| F29 | 10 A | Auto-stop-start. |
| F30 | – | Not used. |
| F31 | 5 A | Accessory delay. |
| F32 | 10 A | Powertrain control module. |
| F33 | 15 A | Crankshaft position sensor. Camshaft position sensor. Mass air flow sensor (2.0 GDI). |
| F34 | 10 A | Ignition coil (1.0L EcoBoost). Coolant pump. |
| F36 | 5 A | Heated oxygen sensor. Evaporative emission canister purge valve. Active grille shutter. |
| F37 | 15 A | Daytime running lamps. |
| F38 | 15 A | Headlamp control module. 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. |
| R1 | – | Cooling fan. |
| R2 | – | Horn. |
| R3 | – | Heated windshield relay. |
| R4 | – | Not used. |
| R5 | – | Rear window wiper. |
| R6 | – | Not used. |
Passenger Compartment Fuse Box
| Fuse | Amps | Circuit |
|---|---|---|
| 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. |
| 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. |
| 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. |
| F74 | 15 A | Secondary on-board diagnostic control module A. Headlamp high beam. |
| F75 | 15 A | Front fog lamps. |
| F76 | 10 A | Reversing lamp. |
| F77 | 20 A | Windshield washer pump. |
| F78 | 5 A | Rear window washer pump. Push button ignition switch. |
| F79 | 15 A | Audio unit. |
| F80 | 20 A | Hazard flasher switch. Power door locks. Moonroof. |
| F81 | 5 A | Radio frequency receiver. |
| F82 | 20 A | Windshield washer pump. |
| F83 | 20 A | Rear window washer pump. Tracking and blocking control module. |
| F84 | 20 A | Driver door unlock. |
| F85 | 7.5 A | Voltage quality monitoring. |
| F86 | 10 A | Air conditioning clutch. Front parking aid camera. Audio unit. Moonroof. Supplemental restraint system. |
| F87 | 15 A | Passenger sensing system. Heated steering wheel. |
| F88 | – | Not used. |
| F89 | – | Not used. |
Luggage Compartment Fuse Box
| Fuse | Amps | Circuit |
|---|---|---|
| F1 | – | Not used. |
| F2 | – | Not used. |
| F3 | 5 A | Remote keyless entry. |
| F4 | 25 A | Left-hand front power windows. |
| F5 | 25 A | Central locking system. Left-hand heated exterior mirror. |
| F7 | 25 A | Left-hand rear-window power. |
| F8 | – | Right-hand rear power windows. |
| 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. |
| R1 | – | Not used. |
| R2 | – | Not used. |
| R3 | – | Not used. |
| R4 | – | Not used. |
| R5 | – | Not used. |
| R6 | – | Not used. |
Listings are copied as text from the manual's fuse tables (AI-assisted; every circuit name was matched against the cited pages 2026-10-18). Fuse layouts can differ by trim and year; check the label on the fuse box cover before replacing a fuse, and always use the same amp rating.
Confirm with your own manual, dipstick or door-jamb label.
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