The Alfa Romeo 155 is a compact executive car produced by the Italian car manufacturer Alfa Romeo from 1992 to 1998. It is a sporty sedan with a sleek design and an impressive performance that made it stand out in its class. The Alfa Romeo 155 is equipped with various electrical components, including a fuse box and relay, which are essential for the car’s overall functionality.
Design and Performance
The Alfa Romeo 155 boasts a sleek, sporty design that reflects its high-performance capabilities. It features a front-wheel-drive layout and a transverse engine, with a choice of petrol or diesel engines. The petrol engines range from 1.6 to 2.0 liters, while the diesel engines range from 1.9 to 2.5 liters. The engines are coupled with either a manual or automatic transmission, depending on the model.
Fuse Box and Relay
The Alfa Romeo 155’s fuse box is located on the driver’s side of the dashboard, just below the steering wheel. It houses the car’s fuses, which protect the electrical components from electrical overload or damage. The fuse box also contains the relays, which are responsible for regulating the power supply to different electrical systems, such as the headlights, wipers, and air conditioning.
Regular maintenance of the fuse box and relay is crucial to ensure the car’s electrical system’s proper functioning. Any malfunctioning fuse or relay should be replaced immediately to prevent further damage to the car’s electrical components. In case of any electrical issues, it is advisable to seek the services of a qualified technician to diagnose and repair the problem.
(1992-1998) Alfa Romeo 155 fuse box and relay with Diagram
Alfa Romeo 155 1992-1998 Dashboard
| No. | Amps | Assignment/Designation |
| 1 | 10A | Hazard warning lights |
| 2 | 20A | Horns, Cigar lighters, Stoplights, Boot release, Radio |
| 3 | 20A | Windscreen wipers |
| 4 | 20A | Roof light timer |
| 5 | 10A | Control lighting, Rear left and front right sidelights, RH number plate light |
| 6 | 10A | Front fog lamps (+ warning lamp) |
| 7 | 10A | RH dipped beam headlight |
| 8 | 10A | LH dipped beam headlight |
| 9 | 10A | RH main beam headlight |
| 10 | 10A | LH main-beam headlight (+ warning lamp) |
| 11 | 7,5A | Rear foglamp (+ warning lamp) |
| 12 | 30A | Heated rear window (+ warning lamp), Door mirror defrosters |
| 13 | 20A | Heating/air conditioning fan, Seat warming, Rear and front power windows, Radio |
| 14 | 20A | Engine cooling fan (6V) |
| 25A | Electric fan for radiator cooling | |
| 15 | 10A | Dashboard, Check Panel, Windscreen washers, Headlight washers, Reversing lights, Controlled damping suspension solenoid valves, Air conditioning compressor control, Engine electric fan control |
| 16 | 7,5A | Interior lights, Clock, Air conditioning control unit |
| 17 | 7,5A | Direction indicators, Door mirror adjustment, Controlled damping suspension |
| 18 | 20A | Door locks |
| 19 | 20A | Front foglamps (+ warning lamp) |
| Relay | ||
| N11 | Door locking control unit | |
| N13 | Hazard warning lights and direction indicators intermittence | |
| N14 | Electronic windscreen wiper intermittence | |
| I2 | Heated rear window relay | |
| I3 | Horn relay | |
| I17 | Fog-light relay | |
| I25 | Rear fog light relay | |
| I35 | Key-operated supply relay | |
| I49 | Dipped beam headlight | |
| I50 | Main beam headlight | |
| I64 | Sidelights relay | |
Auxiliary Fusebox
| A | Colour | Color |
| 20 | Black | Headlight washer intermittence |
| 25 | Brown | Passenger side power window |
| 10 | Red | ABS |
| 25 | Blue | Rear power windows |
| 30 | Green | Electric seat adjustment |
| 30 | Red | Boot release |
| 20 | Brown | Controlled damping suspension |
| 30 | White | Sunroof |
| Black | Timer for headlight washer | |
| Green | Relay for radiator fan (only for TS model) |
1.8-2.0 TS Model
The following fuses are housed on a bracket located between the battery and the air-flow meter:
| No. | Assignment/Designation |
| 1 | Control unit power supply |
| 2 | Lambda probe (for vehicles equipped with catalytic converter) |
| 3 | Fuel pump |
| Relay | |
| R1 | Fuel pump relay |
| R2 | Main relay |
| R3 | Timing variator relay |
| R4 | Relay for services |
2.4 V6 model
The following fuses are located in a box located on the rear wall of the engine compartment next to the tank
| No. | Assignment/Designation |
| 1 | Lambda probe (for vehicles equipped with catalytic converter) |
| 2 | Fuel pump |
| Relay | |
| R1 | Fuel pump relay |
| R2 | Main relay |
| R3 | Relay for services |
Heating-Ventilation System
For vehicles equipped with a heating-ventilation system, the fuses relating to the specific parts are housed in a container located on the front wall of the engine compartment.
| No. | Amps | Assignment/Designation |
| 1 | 30A | Passenger compartment electric fan |
| 2 | 40A | Engine cooling liquid radiator electric fan (only for 2.4 V6 model) |
| 3 | 15A | Air conditioning system compressor |
| Relay | ||
| A | Relay for engine cooling liquid radiator fan (only for 2.4 V6 model) | |
| B | Slug for engine cooling liquid radiator fan | |
| C | Relay for air conditioning compressor cut-in | |
| D | Supplementary relay | |
The following fuses are housed in the rear left-hand part of the engine compartment next to the brake-clutch fluid reservoir
| No. | Amps | Assignment/Designation |
| 1 | 50A | Heating-ventilatton system control unit |
| 2 | 40A | Engine cooling liquid radiator fan (only for 1.8 – 2.0 TS model) |
In conclusion, the Alfa Romeo 155 is an impressive car that offers a unique blend of sportiness and luxury. Its sleek design, high-performance capabilities, and various electrical components, including the fuse box and relay, make it a top choice among car enthusiasts. Regular maintenance of the electrical system, including the fuse box and relay, is crucial to keep the car functioning correctly.
