Peugeot 406 facelift (2002-2004) in saloon and Break estate bodies has two principal fuse boxes: one beneath the driver’s dashboard and another under the bonnet beside the battery. The 2003 owner’s handbook distinguishes six lettered protection points A-F from the numbered dashboard fuses and lists the under-bonnet fuses separately. The 406 Coupe is a related but not identical electrical configuration.
All 57 positions from the earlier Polish article are retained in two complete tables: 39 dashboard entries including spare fuses and the airbag safety shunt, and 18 engine compartment positions. Certain circuits apply only to the estate, petrol or diesel engine, heated seats and other factory options. The fuse lid and actual build-specific electrical legend take precedence over a different body or DAM production number.
Where are the Peugeot 406 fuse boxes?
Dashboard: turn off the ignition and electrical equipment. From the driver’s footwell, locate the lower fascia fuse cover near the steering column. Using a coin, turn its three fasteners a quarter-turn, pull the marked handle and lower the cover to access the fuse carrier. The factory fuse-puller is nearby. The BSI control electronics sit behind the trim; routine inspection does not require unplugging the BSI connectors.
Engine bay: open the bonnet, locate the covered fuse block directly beside the battery, press the cover clips and lift it to inspect positions 1-18. After inspecting the fuses, fully clip the lid back into place to keep out moisture. The handbook identifies certain high-current protection elements for professional servicing rather than improvised repair.
Passenger compartment fuse box – lettered positions A-F and numbered 1-28
The lettered positions handle central locking, fog lamps, heated mirrors, the estate rear wiper, electric windows and main instrument/audio/air-conditioning supply. The normal dashboard fuses include the cigarette lighter, stop lamps, seat electrics, radio and BSI feeds. Position 1 is an SRS airbag safety shunt, not a normal amp-rated fuse. R and R2-R5 are spare replacement fuses stored in the carrier, not active protection circuits.
| Pozycja | Amperaż [A] | Chroniony obwód / funkcja |
|---|---|---|
| A | 20 | Central door locking and deadlocking |
| B | 10 | Rear fog lights |
| C | 40 | Heated exterior mirror demisting |
| D | 15 | Rear window wiper on 406 Break estate; generally unoccupied on saloon |
| E | 30 | Power windows |
| F | 15 | Instrument cluster, multifunction display, audio, navigation and air conditioning supply |
| 1 | Zwor | SRS airbag safety shunt – not a current-rated blade fuse |
| 2 | 5 | Cabin ventilation control circuit |
| 3 | 10 | Instrument cluster |
| 4 | 5 | Ignition-switched BSI (Built-in Systems Interface) power feed |
| 5 | – | Unoccupied position |
| 6 | 10 | Steering wheel stalk control module |
| 7 | 15 | Anti-theft alarm siren |
| 8 | 10 | Satellite navigation system where installed |
| 9 | 5 | Permanent battery supply for the BSI module |
| 10 | 15 | Radio and audio head unit |
| 11 | 10 | High-mounted third brake light |
| 12 | 10 | Right brake/stop light |
| 13 | 20 | Driver’s power window |
| 14 | 30 | Rear power windows relay supply, including passenger window on some versions |
| 15 | – | Battery positive feed for trailer towing socket; no amp rating specified |
| 16 | 20 | Seat memory electronics |
| 17 | 20 | Electric front passenger seat |
| 18 | 10 | Cigarette lighter illumination, multifunction display and switch/ashtray backlighting, automatic gear selector illumination |
| 19 | 10 | Rear fog lamps |
| 20 | 10 | Rear right and front left side/position lamps |
| 21 | 10 | Rear left and front right side/position lamps |
| 22 | 10 | Glove compartment, map-reading, vanity mirror and interior courtesy lights; window switches |
| 23 | 20 | Cigarette lighter 12 V power socket |
| 24 | – | Unoccupied position |
| 25 | 20 | Radio and additional audio equipment supply |
| 26 | – | Unoccupied position |
| 27 | 5 | Rear power windows relay control |
| 28 | 15 | Heated seats where fitted |
| R | 5 | Spare 5 A fuse – not an active circuit |
| R2 | 10 | Spare 10 A fuse – not an active circuit |
| R3 | 30 | Spare 30 A fuse – not an active circuit |
| R4 | 20 | Spare 20 A fuse – not an active circuit |
| R5 | 15 | Spare 15 A fuse – not an active circuit |
12 V cigarette lighter: dashboard F23 (20 A) is the power socket supply, while F18 (10 A) serves its illumination and dashboard switch lighting. A lighter socket may have power even if its lamp has failed, or vice versa.
Engine compartment fuse box – all 18 positions
The engine carrier supplies petrol injection, the diesel FAP particulate-filter controller, automatic transmission, washer pumps, headlamps and cabin blower. The handbook dated 17 February 2003 documents the separate left and right dipped and main beam feeds. The diesel FAP controller and Break rear-wiper relay share a documented application at F5 (10 A), where fitted.
| Pozycja | Amperaż [A] | Chroniony obwód / funkcja |
|---|---|---|
| F1 | 10 | Reversing lights, double injection relay, engine oil temperature and level sensors, air conditioning compressor |
| F2 | 15 | Petrol fuel pump and EVAP canister purge solenoid |
| F3 | 10 | Electronic control unit |
| F4 | 10 | Engine and automatic gearbox control computers |
| F5 | 10 | Diesel particulate filter (FAP) ECU and rear wiper relay on Break estate |
| F6 | 15 | Front fog lamps |
| F7 | 20 | Headlamp washer pump |
| F8 | 20 | Direct-injection petrol engine controller and clutch pedal switch |
| F9 | 15 | Left dipped-beam headlamp |
| F10 | 15 | Right dipped-beam headlamp |
| F11 | 10 | Left high-beam headlamp |
| F12 | 10 | Right high-beam headlamp |
| F13 | 15 | Horn |
| F14 | 10 | Windscreen washer pump and rear washer on equipped estate |
| F15 | 30 | Ignition coils, front windscreen wipers, oxygen sensor, oil pressure switch and fuel injection |
| F16 | 30 | Secondary-air pump, oil sensors, stop-lamp control, alternator and fuel injection relay |
| F17 | 30 | Electric passenger seat |
| F18 | 40 | Cabin heater/air conditioning blower, starter relay and slow-speed front wiper circuit |
406 saloon, Break and Coupe – do not interchange fuse cards
Break estate: the rear-wiper system can occupy dashboard D (15 A) and related engine F5 control. A normal saloon has no rear wiper and may leave D empty. Petrol engines: coil and EVAP canister circuits appear in the engine box. HDi diesels: the FAP controller is fitted only to equipped versions. Optional heated seats, electric seats, trailer wiring and navigation change which circuits are populated.
The 406 Coupe has different body equipment, including glass, doors and electric-window configurations, and may show another allocation for the lettered D position. Earlier 406s also used different BSI and fuse layouts. Identify the factory configuration, not simply the vehicle’s registration year.
Useful Peugeot 406 electrical fault checks
Rear wiper on a Break does not work: inspect dashboard position D (15 A), engine F5 (10 A) where applicable, and the wiring inside the tailgate hinge boot. A saloon cannot be diagnosed from this estate-only circuit.
Cigarette lighter / 12 V socket dead: check dashboard F23 (20 A), followed by the socket terminals. Its light uses F18 (10 A), a different circuit. Driver window stopped: check F13 (20 A), the window motor and door wiring. Rear electric windows use the F14 (30 A) feed and F27 (5 A) relay control on equipped vehicles.
One dipped headlight failed: engine F9 (15 A) protects the left and F10 (15 A) protects the right. Horn inoperative: engine F13 (15 A). Cabin blower not working: engine F18 (40 A); if it only runs at full speed, inspect the regulator and motor.
Engine cranks but does not start: check battery voltage, earth connections and the relevant F1-F4 injection supplies. A blown fuse is only one possible cause; fuel delivery, sensors and injection relays need engine-specific testing.
Contemporaneous Peugeot electrical guides on this site include the Peugeot 206 CC and Peugeot Partner I. They have different fuse carriers and should not be used as a substitute for the 406 table.