Learn about Citroën C4 2004-2010 fuse box and relay’s locations, functions, and maintenance tips for optimal vehicle electrical system.
The Citroën C4 (2004-2010) is available in multiple body styles, including a five-door hatchback and a three-door coupe, both characterized by their modern, sleek design and innovative technology. These models come equipped with various electrical features such as power windows, mirrors, lighting systems, and infotainment, all of which rely on a well-functioning electrical system. The fuse box and relays are key components of this system, ensuring that each electrical feature operates smoothly. The main fuse box is usually located under the dashboard, while additional relays may be found in the engine compartment, controlling components like the air conditioning, lighting, and fuel pump. Proper maintenance of the fuse box and relays ensures reliability of the car’s electrical components.
MUST READ: DYI – How to Check Car Fuses?
(2004-2010) Citroën C4 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.
Citroën C4 2004-2010 fuse assignment
- Cigar lighter (power outlet) fuses are the fuses F8 (Front 12V socket) and F9 (Cigar lighter / Rear 12V socket) in the Instrument panel fuse box.
Year of production: from 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
Fuse box location
There are two fuseboxes under the dashboard, one fusebox in the engine compartment and another on the battery.
Dashboard fuse boxes
Left-hand drive vehicles:
It is located in the lower dashboard (left-hand side).
Right-hand drive vehicles:
To access the fuses below the dashboard, pull back the access cover, undo the screws a quarter turn and tilt the whole unit.
Engine compartment
To access the engine compartment fusebox, detach and remove the cover.
Fuses on the battery
Fuse box diagrams
2004
Dashboard Fuse box 1
Assignment of the fuses in the Dashboard Fuse box 1 (2004)
| Number | Rating | Functions |
|---|---|---|
| F1 | 15 A | Central locking |
| F2 | 30 A | Central locking – Deadlocking |
| F3 | 5 A | Airbags and pretensioners |
| F4 | 10 A | Diagnostic socket – Brake switch – Photochromic rear view mirror – ESP – Coolant level sensor – Diesel fuel additive system – Power steering Clutch pedal switch (ESP, cruise control and speed limiter) |
| F5 | 30 A | Electric front windows – Heated exterior rear view mirrors |
| F6 | 30 A | Electric rear windows |
| F7 | 5 A | Interior lighting |
| F8 | 20 A | Audio system – NaviDrive – Display – Alarm – Front 12V socket – Trailer relay unit -Driving school module |
| F9 | 30 A | Cigar lighter – Rear 12V socket |
| F10 | 15 A | Tyre pressure sensor – Auto. – STOPLAMP switch |
| F11 | 15 A | Ignition – Diagnostic socket – Particle filter |
| F12 | 15 A | Electric seat – Lane wandering alert – Parking assistance |
| F13 | 5 A | Rain sensor – Sunlight sensor – (6 speed) Electronic Gearbox System – Engine relay unit |
| F14 | 15 A | Air conditioning – Instrument panel – Tachometer – Airbags and pretensioners -Trailer relay unit – Bluetooth telephone |
| F15 | 30 A | Central locking – Deadlocking |
| F16 | SHUNT | |
| F17 | 40 A | Heated rear screen |
Dashboard Fuse box 2
Assignment of the fuses in the Dashboard Fuse box 2 (2004)
| Number | Rating | Functions |
|---|---|---|
| F36 | 20 A | Hi Fi amplifier |
| F37 | 30 A | Front left hand electric seat |
| F39 | 20 A | Heated seats |
Engine compartment
Assignment of the fuses in the Engine compartment (2004)
| Number | Rating | Functions |
|---|---|---|
| F1 | 20 A | ECU engine management – Cooling fan |
| F2 | 15 A | Warning |
| F3 | 10 A | Windscreen and rear screen wash |
| F4 | 20 A | Headlamp washer |
| F5 | 15 A | Fuel pump |
| F6 | 10 A | Auto. – Xenon lamps – Directional headlamps – Canister purge electrovalve (2.0 16V engine) |
| F7 | 10 A | ABS ECU/ESP ECU – Power steering |
| F8 | 20 A | Starter |
| F9 | 10 A | Additional heating control unit (Diesel) – Engine coolant level switch |
| F10 | 30 A | Enqine electrovalve – Water-in-diesel-fuel sensor – ECU enqine manaqement -Injectors – Ignition coil – Oxygen sensor – Canister purge electrovalve (1.4 16V and 1.6 16V engines) |
| F11 | 40 A | Air blower – Air conditioning |
| F12 | 30 A | Windscreen wiper |
| F13 | 40 A | Built-in Systems Interface |
| F14 | 30 A | Air pump (engine 2.0i 16V) |
2008, 2009, 2010
Dashboard Fuse box 1
Assignment of the fuses in the Dashboard Fuse box 1 (2008, 2009, 2010)
| № | Rating | Functions |
|---|---|---|
| F1 | 15 A | Rear screen wipe |
| F2 | 30 A | Central locking – Deadlocking |
| F3 | 5 A | Airbags and pretensioners |
| F4 | 10 A | Diagnostic socket – Brake switch – Photochromic rear view mirror – ESP – Coolant level sensor – Diesel additive – Clutch pedal switch (ESP, cruise control and speed limiter) |
| F5 | 30 A | Front windows, Heated exterior rear view mirrors |
| F6 | 30 A | Rear windows |
| F7 | 5 A | Interior lighting |
| F8 | 20 A | Multifunction screen, radio, steering wheel controls, Displays – Alarm – Front 12 V socket -Trailer unit – Driving school module |
| F9 | 30 A | Lighter – Rear 12 V socket |
| F10 | 15 A | Deflation detection – Automatic gearbox – STOP switch |
| F11 | 15 A | Ignition switch – Diagnostic socket – Particle filter |
| F12 | 15 A | Electric seat – Lane departure warning system – Parking assistance |
| F13 | 5 A | Rain sensor – Brightness sensor – Electronic gearbox system (6-speed) – Engine relay unit |
| F14 | 15 A | Air conditioning – Instrument panel – Rev counter – Airbags and pretensioners – Trailer unit Bluetooth® telephone |
| F15 | 30 A | Central locking – Deadlocking |
| F16 | – | SHUNT |
| F17 | 40 A | Heated rear screen |
Dashboard Fuse box 2
Assignment of the fuses in the Dashboard Fuse box 2 (2008, 2009, 2010)
| Number | Rating | Functions |
|---|---|---|
| F36 | 30 A | Hi Fi amplifier |
| F37 | 30 A | Driver’s electric seat |
| F39 | 20 A | Heated seats |
Engine compartment
Assignment of the fuses in the Engine compartment (2008, 2009, 2010)
| № | Rating | Functions |
|---|---|---|
| F1 | 20 A | Engine management control unit – Cooling fan |
| F2 | 15 A | Horn |
| F3 | 10 A | Front and rear screen wash |
| F4 | 20 A | Headlamp wash |
| F5 | 15 A | Fuel pump |
| F6 | 10 A | Automatic gearbox – Xenon headlamps – Directional headlamps – Canister discharge electrovalve |
| F7 | 10 A | ABS control unit/ESP control unit – Power steering |
| F8 | 25 A | Starter motor |
| F9 | 10 A | Additional heating unit (Diesel) – Engine coolant level switch |
| F10 | 30 A | Engine electrovalve – Water in diesel sensor – Engine management control unit – Injectors -Ignition coil – Oxygen sensor – Canister discharge electrovalve (1.4i 16V and 1.6i 16V engines) |
| F11 | 40 A | Air blower – Air conditioning |
| F12 | 30 A | Windscreen wipe |
| F13 | 40 A | Built-in Systems Interface (BSI) |
| F14 | – | Not used |
| F15 | 10 A | Right-hand main beam |
| F16 | 10 A | Left-hand main beam |
| F17 | 15 A | Left-hand dipped beam |
| F18 | 15 A | Right-hand dipped beam |
| F19 | 15 A | Engine management control unit (1.4i 16V et 1.6i 16V engines) |
| F20 | 10 A | Engine electrovalve |
| F21 | 5 A | Cooling fan relay – Valvetronic |
Fuses on the battery
Assignment of the fuses on the battery (2008, 2009, 2010)
| № | Rating | Functions |
|---|---|---|
| F1 | – | Not used |
| F2* | 30 A | Gearbox (electronic system or automatic) |
| F3 | – | Not used |
| F4 | – | Not used |
| F5* | 80 A | Power steering electropump assembly |
| F6‘ | 70 A | Heating unit (Diesel) |
| F7* | 100 A | Switching and protection unit |
| F8 | – | Not used |
| F9* | 30 A | Electronic gearbox system electropump assembly |
| F10* | 30 A | Valvetronic electric motor |
| MF1* | 30 A / 50 A | Cooling fan |
| MF2* | 30 A | ABS/ESP pump supply |
| MF3* | 50 A | ABS/ESP control unit |
| MF4* | 80 A | Built-in systems interface |
| MF5* | 80 A | Built-in systems interface |
| MF6* | 80 A | Passenger compartment fuse box |
| MF7* | 20 A | Diagnostic socket/PEF additive pump |
| MF8* | – | Not used |
| * The maxi-fuses provide additional protection for the electrical systems. All work on these fuses must be carried out by CITROËN technicians. |
Conclusion
For owners and enthusiasts of classic Citroën C4 2004-2010, understanding the fuse box and relay systems is essential for vehicle maintenance. Regular inspection and maintenance of these components helped ensure the vehicle’s longevity and reliability, preserving its status as a symbol of Citroën’s craftsmanship and innovation in the automotive industry during that era.