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Fuse box diagrams (layout, location, function, assignment) in the cabin and engine compartment of Alfa Romeo 156 (1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007).
Checking and Replacing Fuses
The fuse is a protective element of the electrical system: basically it operates (i.e. it gets disconnected) in case of break-down or wrong operation on the system.
When an electrical devices ceases to function, make sure it has not fused. The filament must not be broken: if so, replace the burnt fuse with another of the same value (same color).
Extract the fuse to be replaced using the pincers situated on the fuse box.
Some spare fuses are housed at the right of the control unit in the engine compartment. You are advised to replenish the stock of spare fuses when they are used.
Warning!
Never replace a broken fuse with anything other than a new fuse. Use always an intact fuse of the same color.
If a main protective fuse (MAXI-FUSE o MEGA-FUSE) intervenes, do not fix it but contact an Alfa Romeo Authorized Services.
Before replacing a fuse check that the key has been removed from the ignition and that all the services are switched off and/or disengaged.
If a fuse blows again contact Alfa Romeo Authorized Services.
Passenger Compartment Fuse Boxes
Fuse and Relays in the Main Fusebox
The fuses for the main devices are housed in a control unit under the dashboard, to the left of the steering column.
To gain access to the main fusebox, remove the panel (A) releasing the tabs (B) in the direction of the arrow below and remove the screw (C).
| № | A | Description |
|---|---|---|
| 1 | 10 | Right main-beam headlamp |
| 2 | 10 | Left main-beam headlamp Main-beam headlamp warning light |
| 3 | 20 | Door locking system Boot light |
| 4 | 20 | Right dipped-beam headlamp/Xenon lamps (optional) |
| 10 | Headlamp aiming device | |
| 5 | 30 | Front power windows |
| 6 | 10 | Right front side light Left rear side light Right number plate light Right rear fog guard |
| 7 | 10 | Left front side light Right rear side light Left number plate light Left rear fog guard |
| 8 | 20 | Left dipped-beam headlamp/Xenon lamps (optional) |
| 9 | 15 | Cigar lighter Odour sensor Climate control system |
| 10 | 20 | Windscreen wiper Windscreen washer Rearscreen wiper Rain sensor (optional) |
| 11 | 20 | Horns |
| 12 | 10 | Car interior and glovebox lights Instrument cluster Sound system Diagnosis socket Electronic alarm system |
| 13 | 10 | Cruise Control (optional) Reversing lights Sound system Car interior and glovebox lights GSM Box for Connect Navigator-electronic warning system Wing mirror adjustment Remote control |
| 14 | 10 | Direction indicators Hazard warning lights |
| 15 | 30 | Rearscreen heating Wing mirror defrosting Rearscreen heating warning light |
| D | - | Spare |
| A | Dipped beam light relay | |
| B | Relay for sunroof, seat heater, rear window power control, seat electric adjustment | |
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Fuses above the Main Fusebox
The protection fuses of certain devices are grouped together on three containers located above the main fusebox to which access is gained removing the panel.
| № | A | Description |
|---|---|---|
| 1 | 7.5 | Services switched off with starting |
| 2 | 10 | Air bag system |
| 3 | 10 | Controls lighting Stop lights |
| 4 | 20 | Left rear power window |
| 5 | 20 | Right rear power window |
| 6 | 10 | Rear control lighting from sidelights |
| 7 | 30 | Boot electric opening |
| 8 | 30 | Seat heating Sunroof Seat electrical adjustment |
| 9 | 25 | HI-FI BOSE system |
| 10 | 20 | Supplementary electrical socket in the boot (Sportwagon versions) |
| 11 | 10 | ABS system |
| 12 | 7.5 | Battery power supply for Alfa Romeo CODE Injection system |
| 13 | 7.5 | Alfa Romeo CODE system Electronic ignition and injection system |
| 14 | 15 | Electronic ignition and injection system |
| 15 | 15 | Electronic ignition and injection system |
| 16 | 15 | Fog lamps |
Fuses and Relays in the Glovebox
Some fuses and relays for services supplied on request or only for certain specific market versions are located on a bracket behind the glovebox.
To gain access to the fuses remove (A) the pressure-fitted lid. Access to the relays is gained by removing the glovebox.
| № | A | Description |
|---|---|---|
| 1 | 20 | Headlamp washer |
| A | Fog light relay (where required) | |
| B | Headlamp washer timer (where required) | |
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Engine Compartment Fuses
Engine Compartment Fuse Box Diagram
| № | A | Description |
|---|---|---|
| 1 | 40 | Passenger compartment fan (petrol versions) |
| 80 | General service supply (diesel versions) | |
| 2 | 30 | (+15) key-controlled service supply (ignition switch) |
| 3 | 70 | General service supply |
| 4 | 40 | Passenger compartment fan (diesel versions) |
| 80 | General service supply (petrol versions) | |
| 5 | 30 | Electronic ignition and injection system |
| 6 | 40 | Engine cooling radiator fan (First speed; 2.5 V6 24V versions) |
| 50 | Engine cooling radiator fan (First speed; T.SPARK and JTS versions) | |
| 60 | Engine cooling radiator fan (First speed; diesel versions) | |
| 7 | 30 | Engine cooling radiator fan (Second speed; T.SPARK and JTS versions) Selespeed gearbox |
| 40 | Engine cooling radiator fan (Second speed; diesel versions) Engine cooling radiator fan (Second speed; 2.5 V6 24V versions) Automatic gearbox | |
| 8 | 70 | Glow plugs and resistances on fuel oil filter (diesel versions) |
| 20 | Automatic gearbox (2.5 V6 24V version) Selespeed gearbox (2.0 JTS version) | |
| 9 | 60 | ABS system |
| 10 | 70 | Additional heater (diesel version only) |
| 30 | Oil pump supply (Selespeed versions only) |
Relays in the Engine Compartment
Located in front of the battery (remove the cover).
| № | Description |
|---|---|
| A | Engine radiator cooling fan 2nd speed relay (T.SPARK versions) |
| B | Engine radiator cooling fan 1st speed relay |
| C | Fuel pump relay |
| D | Electronic injection relay |
| E | Climate control compressor relay |
| F | Timing variator relay (1.6 T.SPARK only) Engine radiator fan 2nd speed relay (only 2.5 V6 24V, JTD and JTD 16V Multijet versions). |
| G | Fuel oil heater relay (only Diesel versions) |
Additional Fuses for Diesel Versions
For Diesel versions, depending on the options installed, there is a second bracket fastened to the engine compartment rear bulkhead.
| № | A | Description |
|---|---|---|
| A | 30 | Additional passenger compartment heater 2nd level relay |
| B | 30 | Additional passenger compartment heater 1st level relay |
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