The Alfa Romeo 159 is a compact executive car produced by the Italian automaker Alfa Romeo between 2004 and 2011. The 159 is introduced as a replacement for the Alfa Romeo 156 and is available in both sedan and wagon body styles. The car is designed by Giorgetto Giugiaro at Italdesign, and is built on a GM/Fiat platform, which it shares with the Alfa Romeo Brera, Alfa Romeo Spider, and the Opel/Vauxhall Vectra.
The Alfa Romeo 159 boasts of stylish exterior design and a comfortable and spacious interior. It also features a variety of engine options, including petrol and diesel engines, and a range of transmission options, including manual and automatic. Additionally, the car comes equipped with various electrical components, including a fuse box and relay, which are essential for ensuring the smooth operation of the car’s electrical systems.
Alfa Romeo 159 Electrical System
The Alfa Romeo 159’s electrical system is responsible for controlling various electrical components, including the car’s lighting, entertainment systems, and climate control, among others. The car’s electrical system comprises a variety of components, including a battery, alternator, fuse box, and relay.
The fuse box and relay are essential components of the car’s electrical system. The fuse box is responsible for protecting the car’s electrical circuits from damage caused by electrical faults, while the relay is responsible for controlling the flow of electricity to various electrical components. In the Alfa Romeo 159, the fuse box and relay are located in the engine compartment. It is important to regularly check and replace the fuses and relays to ensure the smooth operation of the car’s electrical systems. In case of any electrical faults, it is recommended to consult a qualified mechanic to diagnose and fix the problem.
(2004-2011) Alfa Romeo 159 fuse box and relay with Diagram
Engine Compartment Fuse Box
Fuses are grouped into four fuse boxes to be found respectively on the dashboard, on the battery positive pole, near the battery and inside the boot (righthand side).
Fuse box on the dashboard
To gain access to the fuses in the fuse box on the dashboard, loosen the fastening screw A and remove the cover B.
| № | Amps | Assignment/Designation |
| 12 | 15A | Right dipped beam headlight |
| 13 | 15A | Left dipped beam headlight |
| 31 | 7.5A | Supply + key for relay coils of engine compartment control unit/dashboard control unit/Body Computer |
| 32 | 15A | Driver’s door branch point/passenger’s door branch point/ignition device |
| 33 | 20A | Rear left window control/boot node |
| 34 | 20A | Rear right window control/boot node |
| 35 | 7.5A | Reversing light/Brake light |
| 36 | 20A | Supply of boot node/locks actuators |
| 37 | 7.5A | Third brake light Positive under key for stop lights/third stop/instrument/lights direction |
| 38 | 15A | Boot opening |
| 39 | 10A | Front/rear ceiling light Supply + battery for air conditioner, ceiling lights, volumetric alarm, EOBD system diagnostic socket |
| 40 | 30A | Heated rear window |
| 41 | 7.5A | Defrosting of external mirrors/heated windshield relay coil |
| 42 | – | – |
| 43 | 30A | Windshield wiper/washer |
| 44 | 10A | Front cigar lighter on central console |
| 45 | 15A | Supply of socket in the boot |
| 46 | 20A | Sunroof |
| 47 | 20A | Power supply of driver door node |
| 48 | 30A | Power supply of passenger door nodes |
| 49 | 7.5A | Front ceiling light + Key for wheel node/Sunroof control unit/Front and rear ceiling lights/Cvs/Blue&Me node/Volumetric/Left and right seat |
| 50 | – | – |
| 51 | 7.5A | Supply under key for Telematic info node/Automatic gearbox node/Additional heater/Left dashboard controls/ START/STOP button, Parking sensors control unit/Electrochromatic mirror/Blue&Me node/Car radio prearrangement/AQS/Cruise Control |
| 52 | 15A | Rear window wiper/Rear lighter |
| 53 | 10A | Direction indicators Hazard lights Instrument panel branch point |
Fuse box on the battery positive pole
To gain access to the fuses in the fuse box on the battery positive pole press the retainers A and remove the protection cover B.
| № | Amps | Assignment/Designation |
| 70 | 150A | Engine housing control unit services |
| 71 | 70A | Instrument panel control unit |
| 72 | 50A | Additional heater (passenger compartment water heating 600W) (diesel versions) |
| 73 | 60A | Plug pre-heating control unit (diesel versions) |
Fuse box near the battery
To gain access to the fuses, loosen the two fastening screws A and remove the protection cover B.
| № | Amps | Assignment/Designation |
| 1 | 60A | Instrument panel control unit |
| 2 | 40A 60*A | Climate control system fan (1.8 140 HP versions) Climate control system fan (2.2 JTS Selespeed versions)* |
| 3 | 20A | Electric steering lock |
| 4 | 40A | Brake branch point (pump) |
| 5 | 40A 20*A | Brake branch point (solenoid valve) (ABS version) Brake branch point (solenoid valve) (VDC version)* |
| 6 | 40A | Radiator fan (low speed) (1.8 140 HP, 2.2 JTS Selespeed versions) |
| 7 | 50A | Radiator fan (high speed) |
| 8 | 30A | Additional heater supply (passenger compartment water heating 300W) (diesel versions) |
| 9 | 20A | Headlight washer |
| 10 | 15A | Horns |
| 11 | – | – |
| 14 | 7.5A | Right main beam headlight |
| 15 | 7.5A | Left main beam headlight |
| 16 | – | – |
| 17 | – | – |
| 18 | – | – |
| 19 | 7.5A | Climate control system compressor |
| 20 | 20A | Rear window heating |
| 21 | 20A | Fuel pump supply |
| 22 | – | – |
| 23 | 15A | Sound system/radio navigation system power/Blue&Me |
| 24 | – | – |
| 30 | 15A | Front fog light |
Fuse box in the boot (left-hand side)
To gain access to the fuses, open the lid on the left side of the boot as shown by the arrow A.
| № | Amps | Assignment/Designation |
| 54 | 30A | Amplifier Bose audio system |
| 55 | – | – |
| 56 | 25A | Front left seat movement control |
| 57 | 7.5A | Driver’s seat warming left |
| 58 | – | – |
| 59 | – | – |
| 60 | 25A | Front right seat movement control |
| 61 | 15A | Amplifier Bose audio system on rear parcel shelf |
| 62 | – | – |
| 63 | – | – |
| 64 | – | – |
| 65 | – | – |
| 66 | – | – |
| 67 | 7.5A | Front passenger’ seat warming right |
| 68 | – | – |
| 69 | – | – |
| 77 | – | – |
| 78 | – | – |
| 79 | – | – |
| 80 | – | – |
Fuse box in the boot (right-hand side)
The fuse specific for the Sportwagon version is located in the fuse box at the right side of the boot (see “In an emergency” chapter).
| To open the fuse box, proceed as follows: 1) use handle B to open the right lid (for versions/markets, where provided) A. | 2)open the fuse box lid C working in the point shown by the arrow. |
| № | Amps | Assignment/Designation |
| 55 | 15A | Socket |
The Alfa Romeo 159 is a stylish and practical compact executive car that offers a comfortable and spacious interior, a range of engine options, and a variety of electrical components, including a fuse box and relay. The car’s electrical system is responsible for controlling various electrical components, and it is essential to regularly check and maintain the fuse box and relay to ensure the smooth operation of the car’s electrical systems. As with any car, it is important to regularly service and maintain the Alfa Romeo 159 to ensure its longevity and reliability.