Alfa Romeo 159 fuse box and relay Diagrams (2004-2011)

The Alfa Romeo 159 is a compact executive car produced by the Italian automaker Alfa Romeo between 2004 and 2011. The 159 was introduced as a replacement for the Alfa Romeo 156 and was available in both sedan and wagon body styles. The car was designed by Giorgetto Giugiaro at Italdesign, and was 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.

MUST READ: DYI – How to Check Car Fuses?

(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.