The Peugeot 406 Coupe (8C, 2002-2004), built by Pininfarina, has two main fuse boxes: one under the driver’s lower dashboard and one beside the battery in the engine compartment. Its two complete tables contain all 57 positions: 39 dashboard entries including A-F lettered feeds, the SRS airbag shunt, empty sockets and five spare fuses, plus 18 engine-bay positions. Coupe-specific features differ from the 406 saloon and Break estate. The actual cover and exact owner’s handbook should determine the final fitted rating.
Where are the Peugeot 406 Coupe fuse boxes?
Passenger compartment: With the ignition off, locate the lower trim beneath the steering wheel on a left-hand-drive Coupe. Use a coin to rotate the three access fasteners a quarter-turn, pull the indicated handle and fold the cover down. The factory fuse puller is stored nearby. The Built-in Systems Interface (BSI) is behind the fascia trim; avoid pulling or probing its wiring unnecessarily.
Engine bay: Open the bonnet, find the black power distribution fuse box next to the battery and release the cover catches. Identify the eighteen numbered positions against the diagram on the lid, and close the cover carefully afterwards so that water cannot reach the connectors. Positions marked with an asterisk in Peugeot documentation relate to additional high-current supply protection; the manual recommends dealer servicing for the Maxi fuse system.
Passenger compartment fuse box – A-F, 1-28 and spare fuses
The dashboard diagram distinguishes the six lettered positions A-F from the main numbered circuits. Fuse D is unused in the Coupe; a generic Peugeot 406 Break diagram might assign that position to a rear wiper, but the Coupe has no such tailgate circuit. Position 1 is the airbag safety shunt, not an ordinary fuse. R and R2-R5 are stored spare fuse blades, not active electrical consumers.
| Pozycja | Amperaż [A] | Chroniony obwód / funkcja |
|---|---|---|
| A | 20 | Central locking and unlocking of the doors |
| B | 10 | Rear fog lamps |
| C | 40 | Heated exterior mirror demisting |
| D | – | Not used on the 406 Coupe; rear-wiper use in the Break estate does not apply |
| E | 30 | Electric power windows |
| F | 15 | Instrument cluster, multifunction display, radio/audio, satellite navigation and climate-control supply |
| 1 | Zwora | SRS central airbag safety shunt; not an ordinary fuse |
| 2 | 5 | Ventilation controls |
| 3 | 10 | Instrument panel |
| 4 | 5 | Ignition-positive signal to Built-in Systems Interface (BSI) |
| 5 | – | Unused position |
| 6 | 10 | Steering wheel control switches |
| 7 | 15 | Factory alarm siren |
| 8 | 10 | Satellite navigation system |
| 9 | 5 | Battery-positive feed to BSI |
| 10 | 15 | Radio / audio system |
| 11 | 10 | High-mounted third brake light |
| 12 | 10 | Right-hand brake light |
| 13 | 20 | Driver’s one-touch electric window |
| 14 | 30 | Passenger’s one-touch electric window |
| 15 | – | Provision for positive trailer feed; no standard fuse value given |
| 16 | 20 | Electric seat position memory |
| 17 | 20 | Electric passenger seat adjustment |
| 18 | 10 | Cigarette-lighter, multifunction display, selector and switch illumination |
| 19 | 10 | Rear fog lamps |
| 20 | 10 | Right rear and left front parking/side lamps |
| 21 | 10 | Left rear and right front parking/side lamps |
| 22 | 10 | Glovebox, courtesy and mirror lighting plus electric window button illumination |
| 23 | 20 | 12 V cigarette lighter power supply |
| 24 | – | Unused fuse position |
| 25 | 20 | Additional radio power feed |
| 26 | – | Unused fuse position |
| 27 | 5 | Accessory electrical feed |
| 28 | 15 | Front heated seats on equipped cars |
| R | 5 | Stored spare 5 A fuse, not a live circuit |
| R2 | 10 | Stored spare 10 A fuse, not a live circuit |
| R3 | 30 | Stored spare 30 A fuse, not a live circuit |
| R4 | 20 | Stored spare 20 A fuse, not a live circuit |
| R5 | 15 | Stored spare 15 A fuse, not a live circuit |
Engine compartment fuse box – positions 1-18
The engine panel protects fuel injection, A/C controls, lamps, headlamp washers, windscreen wipers, blower, seat supplies and engine sensors. Some functions apply only to petrol or diesel equipment: position 5 covers diesel particulate-filter electronics where installed, while position 8 belongs to direct-injection petrol engine equipment. Peugeot’s original list uses an asterisk to identify extra power-distribution protection on certain positions; values still need to match the fitted factory panel.
| Pozycja | Amperaż [A] | Chroniony obwód / funkcja |
|---|---|---|
| 1 | 10 | Reversing lamps, double-injection relay, engine oil temperature and level sensors, air-conditioning compressor |
| 2 | 15 | Fuel pump and petrol vapour-canister (EVAP) solenoid |
| 3 | 10 | Vehicle electronic control unit |
| 4 | 10 | Engine management and automatic transmission control |
| 5 | 10 | Diesel particulate filter (FAP) control module |
| 6 | 15 | Front fog lamps |
| 7 | 20 | Headlamp washer system |
| 8 | 20 | Direct-injection petrol engine controller and clutch pedal input |
| 9 | 15 | Left dipped-beam headlamp |
| 10 | 15 | Right dipped-beam headlamp |
| 11 | 10 | Left main-beam headlamp |
| 12 | 10 | Right main-beam headlamp |
| 13 | 15 | Horn |
| 14 | 10 | Front and rear windscreen washer pump according to configuration |
| 15 | 30 | Ignition coil, windscreen wiper, oxygen sensor, oil-pressure circuit and fuel injection |
| 16 | 30 | Secondary air pump, oil temperature/level, brake light operation, alternator and injection relay control, with additional diesel water sensor functions |
| 17 | 30 | Passenger electric seat power |
| 18 | 40 | Heater blower, starter feed and front wiper low-speed operation |
Peugeot 406 Coupe versus saloon and Break
The Coupe’s door and window wiring differs from the four-door saloon, while the Break estate has a separate rear-wiper installation. This is why fascia D is unused in the Coupe even when another 406 chart shows a 15 A rear-wiper supply. Equipment such as powered seat memory, navigation and seat heaters can vary between trim and production years. The 2.2 HDi diesel’s particulate filter also requires a control circuit that a petrol engine does not use.
Which fuse should you inspect for common Coupe faults?
Cigarette lighter: Fascia No. 23 (20 A) supplies the 12 V socket, while fascia No. 18 (10 A) protects its illumination and other dashboard lighting. Electric windows: Driver’s window at No. 13 (20 A); passenger’s window at No. 14 (30 A), plus the broader letter E (30 A) window circuit. Door wiring and switches are also possible failure points.
Radio or navigation: Fascia Nos. 10 (15 A), 25 (20 A), letter F (15 A) and lettered/BSI supplies according to installed system. One dipped beam fails: Engine box 9 (15 A) protects the left lamp and 10 (15 A) the right. Blower not running: Engine box No. 18 (40 A), with further diagnosis of the motor, controller and connectors. Stop lamps: Fascia Nos. 11 and 12 (10 A each) are associated with the third and right-hand brake lights; inspect the actual rear lamp wiring and brake switch as well.
Related Peugeot models with different fuse systems
The Peugeot 406 saloon and Break (2002-2004) have their own model-specific fuse box guide, and Peugeot 306 (1993-2002) uses several earlier N3/N5 fuse-panel families depending on DAM and VIN. These assignments should not be treated as interchangeable.
Technical basis: Peugeot 406 Coupe Owner’s Manual, Infotec 2002-2004 editions, “Maintenance of Your 406 Coupe: Changing a Fuse”, with the 2004 factory electrical descriptions. Confirm the production configuration before replacing any fuse or shunt.