The Citroen C2 has two main fuse boxes – one in the passenger compartment and one in the engine bay. On this model it is especially important to match the diagram to the production period. Around 2005, both the fuse-box layout and the numbering of many circuits changed.
One table should therefore not be used for every 2003-2009 C2. For example, on a 2004 car the cigarette lighter is assigned to F22, while the later configuration uses F9. The differences in the under-hood fuse box are just as significant.
For a vehicle from the transition period, first compare the physical fuse layout with the drawing and only then use the relevant table. Always replace a fuse with the rating specified for that particular vehicle.
Contents
- Fuse box locations
- How to identify the correct diagram
- Passenger compartment – early 2003-2004 version
- Engine compartment – early 2003-2004 version
- Passenger compartment – from around 2005
- Engine compartment – from around 2005
- MAXI fuses and relays
- FAQ
Fuse box locations
The passenger compartment fuse box is located below the dashboard. Access and the appearance of the panel differ between the earliest C2 models and cars built after the electrical-system changes introduced around 2005.
The engine compartment fuse box is next to the battery. To access the fuses, remove the battery cover and the fuse-box cover. After checking the fuses, close the housing securely again.
The C2 is closely related to the first-generation Citroen C3. Earlier versions of both models may use similar BSI solutions, but you should not assume that every fuse number has the same function.
Citroen C2 before and after 2005 – how to identify the correct diagram
The easiest method is to compare the shape and numbering of the actual fuse box. The early passenger-compartment panel uses, among others, positions F1, F4, F6, F7, F10, F12, F14-F16 and F21-F22. The later layout is characterised by F3-F6, F8-F12, F14-F15, F17 and the F18 shunt.
The difference under the hood is even greater. The early fuse box has positions up to F18 and separate headlight fuses, whereas the later layout described in the 2008 C2 owner’s manual uses F1-F14 in the user fuse table.
Treat 2005 as a transition period. If the physical layout does not match the drawing expected for the model year, follow the appearance of the actual fuse box and documentation for that specific vehicle.
Passenger compartment fuse box – early 2003-2004 version
The diagram below shows the older panel used before the electrical-system change. Individual fuse positions are clearly visible without the rest of the owner’s manual page.
The 2004 C2 owner’s manual lists the following main circuits:
| Fuse | Rating [A] | Function |
|---|---|---|
| F1 | 15 | Diagnostic connector, tow-bar / trailer wiring – depending on equipment |
| F4 | 20 | Display, navigation, alarm, radio |
| F6 | 10 | Control components and sensors related to steering / transmission – depending on version |
| F7 | 15 | Light-level sensor, alarm |
| F10 | 40 | Heated rear window and heated exterior mirrors |
| F12 | 30 | Front power windows; on some versions also the electric roof |
| F14 | 10 | Airbag control unit, engine-compartment fuse-box supply |
| F15 | 15 | Display, navigation, air conditioning, parking sensors, radio |
| F16 | 30 | Central locking / deadlocking |
| F21 | 15 | High-mounted third brake light |
| F22 | 20* | Cigarette lighter, interior lighting, electric mirrors – depending on equipment |
* Documentation differs on F22. The table based on the 2004 C2 owner’s manual gives 20 A, while some later technical references for the “pre-2005” fuse box list 30 A. This is one position where it is particularly important to verify the rating specified for the actual fuse box. Do not increase F22 from 20 A to 30 A solely because an online diagram shows the higher value.
Extended diagrams for the older BSI additionally show, among others, F5 for the alarm siren, F11 for the rear wiper/washer and F20 for the right rear light. Their population can depend on market and BSI version, so for these positions it is safer to follow the markings for the specific module.
Engine compartment fuse box – early 2003-2004 version
The older engine-bay fuse box uses completely different numbering from the later module. The drawing below shows positions F1-F18 and the high-current fuse section.
| Fuse | Rating [A] | Function according to 2004 C2 documentation |
|---|---|---|
| F1 | 10 | Diesel engine preheating system |
| F2 | 15 | Fuel pump |
| F3 | 10 | Electronic control units |
| F4 | 10 | Engine control unit and related circuits – depending on version |
| F5 | – | Version-dependent fitment – not assigned in the 2004 owner’s manual table used for verification |
| F6 | 15 | Front fog lights |
| F7 | 20 | Headlight washers |
| F8 | 20 | Engine management system |
| F9 | 15 | Left low-beam headlight |
| F10 | 15 | Right low-beam headlight |
| F11 | 10 | Left high-beam headlight |
| F12 | 10 | Right high-beam headlight |
| F13 | 15 | Horn |
| F14 | 10 | Washer pump |
| F15 | 15 | Engine-control actuators |
| F16 | 30 | Secondary air pump – depending on engine |
| F17 | 30 | Windshield wipers |
| F18 | 40 | Electric cooling fan |
The early fuse box has separate fuses for the left and right headlights. If the vehicle has this panel, do not use the later F1-F14 table because the same numbers refer to completely different consumers.
Passenger compartment fuse box – from around 2005
The later layout is well documented in the 2008 Citroen C2 owner’s manual. The diagram below shows the fuse positions clearly without the small illustration surrounded by manual text.
| Fuse | Rating [A] | Function |
|---|---|---|
| F3 | 5 | Airbags |
| F4 | 10 | Diagnostic connector, particulate-filter additive system, clutch switch, steering-angle sensor |
| F5 | 30 | No function assigned in the owner’s manual table |
| F6 | 30 | Wiper / washer system – description differs between documentation editions |
| F8 | 20 | Digital clock, steering-wheel controls, radio, display |
| F9 | 30 | Cigarette lighter, digital clock, interior lighting, vanity mirror |
| F10 | 15 | Alarm |
| F11 | 15 | Ignition switch, diagnostic connector |
| F12 | 15 | Airbag control unit, rain and light sensor |
| F14 | 15 | Parking assistance, instrument cluster, air conditioning, Bluetooth telephone – depending on equipment |
| F15 | 30 | Central locking, deadlocking |
| F17 | 40 | Heated / demisted rear window |
| F18 | SHUNT | Customer / transport-mode shunt |
Different descriptions are found for F6 30 A. The English 2008 owner’s manual uses the wording “Screen wash”, while 2006-2007 tables describe this position as a wiper circuit. When diagnosing a specific fault, confirm the position on the vehicle’s fuse box instead of relying only on the consumer name.
The most important practical change compared with the earlier C2 concerns the cigarette lighter: in this layout it is protected by F9 30 A, not F22.
Engine compartment fuse box – from around 2005
The later engine-bay module has a different design and numbering scheme. The technical drawing below is 600 px wide and makes the individual positions easy to read.
| Fuse | Rating [A] | Function |
|---|---|---|
| F1 | 20 | Diesel water-in-fuel sensor |
| F2 | 15 | Horn |
| F3 | 10 | Windshield washer pump |
| F4 | 20 | Headlight washers |
| F5 | 15 | Fuel pump |
| F6 | 10 | Power steering |
| F7 | 10 | Coolant-level sensor |
| F8 | 25 | Starter |
| F9 | 10 | ABS and ESP control units |
| F10 | 30 | Engine-control actuators – ignition coil, solenoids, oxygen sensor, injection; evaporative-emissions system – depending on engine |
| F11 | 40 | Ventilation / heater blower |
| F12 | 30 | Windshield wipers |
| F14 | 30 | Air pump on petrol versions or diesel fuel heater – depending on engine |
F1 and F14 show why different engine versions should not be treated identically. Some functions apply only to diesel engines, while others are used only on petrol cars.
If you are working on another PSA model using similar technology from the same period, there is a separate guide for the Citroen C3 Pluriel. Despite electrical similarities, C2 and C3 Pluriel diagrams should not be used interchangeably.
MAXI fuses and relays
The fuse boxes also contain high-current protection. The later C2 owner’s manual explicitly states that MAXI fuses provide additional protection for the main circuits and should be handled by a dealer or qualified workshop.
For the earliest versions, technical documentation shows an additional MF1-MF8 section, but its population depends on the vehicle configuration. We therefore do not present one MF table as universally correct for every 2003-2004 C2.
The same applies to relays. Some are integrated into the BSI module or the engine-compartment fuse box, and their configuration changes with engine and equipment. Relay diagnosis should use service documentation matched to the exact vehicle version.
FAQ – Citroen C2 fuses
Which fuse is for the cigarette lighter?
In the later configuration used from around 2005, the cigarette lighter is protected by F9 30 A in the passenger-compartment fuse box. On a 2003-2004 C2 with the earlier panel, it is F22; documentation for this early version requires the fuse rating to be checked on the specific panel.
Which fuse is for the starter?
In the later engine-bay fuse box, the starter is assigned to F8 25 A. The early 2003-2004 layout uses different numbering and F8 protects engine management there, so the two tables must not be mixed.
Which fuse is for the horn?
In the later fuse box from around 2005, it is F2 15 A. In the early under-hood configuration, the horn uses F13 15 A.
Which fuse is for the fuel pump?
In the later layout, the fuel pump is protected by F5 15 A. In the early 2004 fuse box, it is F2 15 A.
Which fuse is for the windshield wipers?
In the later engine-bay fuse box, the windshield wipers use F12 30 A. In the earlier 2004 configuration, they use F17 30 A.
Which fuse is for the heated rear window?
In the later layout, it is F17 40 A in the passenger compartment. On the early panel, it is F10 40 A, which also covers the heated mirrors.
Why does my 2005 C2 have a different fuse box?
The electrical system and fuse-box arrangement changed around 2005. Registration year alone is not always enough to identify the version. First compare the physical fuse layout with the appropriate diagram.
Can I replace a 20 A fuse with a 30 A fuse?
Do not increase the fuse rating simply because a diagram for another C2 version lists a different value. The fuse must have the rating specified for the exact fuse box and circuit in the vehicle.