Peugeot 406 vehicles built from the factory DAM/ORGA code 8421 use a newer electrical system than the early BF00/BF01 cars. Its three separately designated fuse groups are the BH28 passenger compartment carrier, the BSI1 body electronics unit and the BM34 engine-bay distribution board. This article provides all 70 numbered positions and power links from the matching service listing, including optional equipment, unused slots and alternative fuse values. Do not treat it as a universal map for every 1995-2004 Peugeot 406.
Which Peugeot 406 cars use DAM 8421 and later?
DAM/ORGA is a production reference code found on a manufacturer vehicle label, normally at a body or door opening, or available using VIN-linked Peugeot service records. Registration year alone is not sufficient to identify the fuse box. Verify the exact cover and the factory build specification, particularly if components have been replaced or an imported market variant has been fitted.
Where are the BH28, BSI1 and BM34 fuse boxes?
BH28 in the cabin: With the ignition switched off, locate the lower dashboard access below the steering wheel on a left-hand-drive car. Open the cover by releasing the retaining catches or quarter-turn fittings and gently lower the panel. The BH28 contains numbered fuses F1-F28, with separate A/B alternatives at F23 and F24. The F1 position is a factory shunt related to SRS and body control equipment; it must not be substituted with a normal fuse.
BSI1 behind the fascia: The built-in systems interface is behind the lower trim near the passenger electrical carrier. It has six independently identified supplementary fuses A-F. Their letters do not continue the BH28 numbering and the BSI is an electronic module, so do not disconnect its harness without following the manufacturer’s procedures.
BM34 under the bonnet: Raise the bonnet and find the covered engine distribution unit by the battery and engine electrical looms. Release the lid catches to reach F-series sockets and large MF-series Maxi fusible links. Refit the cover firmly against moisture. The high-current links require the exact engine specification and service procedure.
BH28 – passenger fuse box positions F1-F28 and variants
The following model-family reference drawing shows the physical 28-position Peugeot 406 dashboard layout and its supplementary lettered positions. It is a related Coupe installation, so the drawing is only a layout reference; the functions and amperages below come from the separate DAM 8421 source. The two F23 entries specify different 20 A accessory supply arrangements, not a pair of lighter fuses to be fitted simultaneously.
| Pozycja | Amperaż [A] | Chroniony obwód / funkcja |
|---|---|---|
| F1 | Shunt | Airbag and belt-pretensioner ECU, BSI connection. Position F1 is a factory shunt, not a normal fuse |
| F2 | 5 | Cabin air-temperature sensor and heater panel |
| F3 | 10 | Instrument panel, stop-light switch and lamps, cruise-control brake and clutch safety switches |
| F4 | 5 | BSI body systems interface |
| F5 | – | Unused socket |
| F6 | 10 | Engine ECU ignition supply |
| F7 | 15 | JBL amplifier and alarm siren where fitted |
| F8 | 10 | Interior and boot lights, multifunction display, navigation, electric-seat and mirror memory, alarm LED |
| F9 | 5 | BSI body electronics supply |
| F10 | 15 | Radio |
| F11 | 10 | Left brake lamp and third high-mounted stop lamp |
| F12 | 10 | Right brake lamp |
| F13 | 20 | Driver one-touch electric window controller |
| F14 | 30 | Rear power-window relay and passenger one-touch window control on applicable bodies |
| F15 | 20 | Factory trailer towbar prewiring |
| F16 | 20 | Electric driver’s seat and position memory for seats and mirrors |
| F17 | 20 | Electric passenger seat |
| F18 | 10 | BSI and illumination for dashboard switches, heater panel, display and automatic selector |
| F19 | 10 | Rear fog lamps and their warning indicators |
| F20 | – | Unused position |
| F21 | – | Unused position |
| F22 | 10 | Rain sensor, reading and glovebox lights, mirror/seat memory, Coupe window switches, vanity lamp and auto-dimming rear-view mirror |
| F23A | 20 | 12 V cigarette lighter, 20 A accessory-switched F23A alternative |
| F23B | 20 | 12 V cigarette lighter, 20 A permanent-battery F23B alternative; not a second fuse simultaneously installed |
| F24A | – | Unused F24A, accessory-positive variant |
| F24B | – | Unused F24B, battery-positive variant |
| F25 | 20 | Wiper stalk, headlamp-washer relay and audio system |
| F26 | – | Unused socket |
| F27 | 5 | BSI, rear-window relay and automatic gearbox key-lock |
| F28 | – | Unused socket |
BSI1 – lettered supplementary circuits A-F
The six BSI fuses are designated A, B, C, D, E and F. In the original Polish post some labels were corrupted by automatic translation into “ZA”, “do”, “re”, “mi” and “fa”. The manufacturer service list confirms the actual six letters. BSI1 covers central door locking, wipers, heated rear glass, optional rear wiper, electric windows and the multiplexed VAN communications network.
| Pozycja | Amperaż [A] | Chroniony obwód / funkcja |
|---|---|---|
| A | 20 | Central locking and deadlocking |
| B | 20 | Front windscreen wipers |
| C | 40 | Heated rear window and exterior mirrors |
| D | 15 | Rear wiper on Break estate versions where fitted |
| E | 30 | Front electric windows and sunroof |
| F | 15 | Vehicle multiplex VAN network supply |
BM34 – engine compartment fuses and Maxi supplies
The engine power board contains 34 listed slots and links. Manufacturer variations matter here: MF2 is 20, 40 or 60 A and MF3 is 40 or 60 A depending on the cooling-fan equipment. F25 is 10 A or 15 A for different petrol engines, and F34 is 10 A on the XU petrol reference or 15 A on the DW diesel installation. The source splits the last two alternative ratings into extra unnumbered HTML rows; they are combined into their proper fuse positions below. The MF15 supply refers to ABS but its amperage is not documented in that source and has not been invented.
| Pozycja | Amperaż [A] | Chroniony obwód / funkcja |
|---|---|---|
| MF1 | 60 | BSI first 60 A main supply |
| MF2 | 20/40/60 | Radiator cooling system – 20 A, 40 A or 60 A factory variant |
| MF3 | 40/60 | Second engine cooling system feed – 40 A or 60 A factory variant |
| MF4 | 30 | Engine running relay and heated-seat feed |
| MF8 | 50 | Passenger compartment BH28 high-current supply |
| MF9 | 60 | BSI main battery power feed |
| MF10 | 30 | Lighting and direction-signalling switches |
| MF11 | 50 | Main ABS ECU supply |
| MF12 | 50 | First ignition switch / anti-theft supply |
| MF13 | 50 | Second ignition switch / anti-theft supply |
| MF15 | Not specified | ABS controller circuit; source does not specify an amperage for MF15 |
| MF16 | – | Unused Maxi position |
| MF17 | – | Unused Maxi position |
| F5 | 15 | Horn |
| F6 | 15 | BSI electronics |
| F7 | 10 | Coolant thermostat and radiator fan relay |
| F14 | 10 | Headlamp washer timer and diagnostic connector |
| F18 | – | Unused separate fuse |
| F19 | – | Unused position |
| F20 | 15 | Electronic variable power-steering and active suspension control |
| F21 | 10 | Battery supply listed at 10 A, protected consumer not specified |
| F22 | – | Unused position |
| F23 | 10 | ABS ECU ignition supply |
| F24 | 10 | Speed sensor, injection double relay and ECU, diesel water-in-fuel detection |
| F25 | 10 / 15 | Fuel pump downstream of inertia switch: 10 A except ES9J4, 15 A for ES9J4 |
| F26 | 30 | Engine injection double relay and power supply to fuel circuit / fuses 25, 28 and 34 |
| F27 | 30 | Second 30 A fuel injection and double-relay supply |
| F28 | 10 | Double injection relay supply; consumer not named |
| F29 | 30 | Secondary-air pump (Pulsair) relay |
| F30 | 10 | Left front fog light and its cluster indicator |
| F31 | 10 | Right front fog light |
| F32 | 10 | A/C pressure switch, coolant temperature and level sensing, reversing lamps, diagnostic connector, cooling fan relay and DW10 BCP3 unit |
| F33 | 10 | Automatic transmission control, selector switch and shift-lock relay |
| F34 | 10 / 15 | XU petrol lambda heater and cruise control, 10 A; DW diesel fuel management and cruise control, 15 A |
Equipment, engine and body variations
The 406 saloon, Break estate and Coupe can differ in rear wiper, window, powered-seat and roof equipment. The Break’s BSI1 D circuit applies to an equipped rear wiper, not a standard Coupe tailgate. Fuel and emission equipment varies between XU petrol engines, ES9J4 V6 and DW diesel engines. Market features such as audio amplifiers, cruise control, ABS, automatic transmission and navigation affect socket occupancy. Match the physical box and exact factory fuse rating before replacing a component.
Which fuses should you check first?
Front 12 V cigarette lighter fails: BH28 F23A (20 A) protects the accessory-switched feed and F23B (20 A) is a permanent supply alternative. Check the fitted circuit and the socket contacts. Windscreen wipers fail: BSI1 B (20 A) is their main supply and BH28 F25 (20 A) protects wiper stalk and control equipment. Rear demister fails: BSI1 C (40 A) supplies the heated glass and mirror circuit.
Doors will not lock: Inspect BSI1 A (20 A). Fuel pump has no power: BM34 F25, rated 10 A on listed engines except 15 A on ES9J4, is an important starting point. Cooling fan stops working: Verify the correct MF2 and MF3 variant together with fan relays, temperature controls and wiring. ABS warning: BM34 MF11 (50 A) and F23 (10 A) relate to ABS, but MF15 has an unspecified rating and must be confirmed from the vehicle itself.
Related Peugeot fuse box systems
Previous Peugeot 406 DAM 7876-8420 installations used a BF00/BF01 architecture. Later Peugeot 406 (2002-2004) and Peugeot 406 Coupe (2002-2004) have their own documented options. The successor Peugeot 407 (2004) uses a different engine, fascia and luggage-compartment fuse distribution.
Technical references: Peugeot 406 factory electrical listings for DAM 8421 onward, with BH28, BSI1 and BM34 designations and variant-specific fuse values. Always check the vehicle’s fuse-box cover and original year/engine wiring.