The Alfa Romeo 147 is a compact car produced by the Italian automaker Alfa Romeo from 2000 to 2010. This model is introduced as a replacement for the popular Alfa Romeo 145 and 146 models. The Alfa Romeo 147 is available in three and five-door hatchback versions and is designed to be a sporty, stylish car that also offered a comfortable ride. The car’s distinctive design and Italian flair helped it to stand out in a crowded market. The 147 is a popular car in its day, and it still has a loyal following today.
The Alfa Romeo 147 had a number of electrical components that were important for its operation. Two of the most important components were the fuse box and relay. The fuse box is located in the engine compartment and contains fuses that protect the electrical system of the car. The relay is a type of switch that is used to control electrical circuits. It is responsible for turning on and off various electrical systems in the car. In this article, we will explore the Alfa Romeo 147’s electrical components, with a focus on the fuse box and relay.
Fuse Box
The Alfa Romeo 147’s fuse box is located in the engine compartment, near the battery. The fuse box contains fuses that protect various electrical systems in the car. These systems include the headlights, tail lights, turn signals, and the car’s computer. If a system fails to function properly, it is possible that a fuse has blown. The fuse box is designed to protect the electrical systems from damage caused by power surges and short circuits.
There are two types of fuses in the Alfa Romeo 147’s fuse box: standard fuses and maxi-fuses. Standard fuses are used for systems that require less power, such as turn signals and interior lights. Maxi-fuses are used for systems that require more power, such as the headlights and the car’s computer. It is important to use the correct fuse when replacing a blown fuse, as using the wrong type of fuse can cause damage to the electrical system.
Relay
The relay is another important electrical component in the Alfa Romeo 147. The relay is responsible for controlling various electrical systems in the car, such as the headlights, air conditioning, and the car’s computer. When a system is turned on, the relay sends power to the system, allowing it to function. When the system is turned off, the relay cuts power to the system, conserving energy and preventing damage.
There are several relays in the Alfa Romeo 147, each of which controls a different system in the car. These relays are located in the fuse box and are easily replaceable if they fail. It is important to use the correct relay when replacing a faulty one, as using the wrong type of relay can cause damage to the electrical system.
(2000-2010) Alfa Romeo 147 fuse box and relay with Diagram
Passenger Compartment Fuse Box
Access is gained to the control box on the dashboard by slackening the two retainers (A) and removing the protective trim (B).
| No. | Amps | Assignment/Designation |
| 12 | 10A | Right Dipped-Beam Headlight |
| 13 | 10A | Left Dipped-Beam Headlight, Headlight Aiming Device |
| 31 | 7.5A | Climate Control System, Heater Unit Relay Coils |
| 32 | 15A | Selespeed Transmission, Key-Operated +30 |
| 33 | 20A | Rear Left Power Window |
| 34 | 20A | Rear Right Power Window |
| 35 | 7.5A | Reversing Light, Cruise Control, Climate Control System Control Lighting |
| 36 | 10A | Trailer Control Unit |
| 37 | 10A | Braking Light, Instrument Cluster |
| 38 | 20A | Central Door Locking |
| 39 | 15A | Climate Control System, Radio, Navigator, Services + 30, Volumetric Sensors, EOBD System Diagnosis Socket, Cell Phone Provision, Driver’s Door Control Unit, Boot Control Unit |
| 40 | 30A | Windscreen, Rear screen Washer (Two-Way Pump) |
| 41 | 7.5A | Heated Mirrors, Heated Nozzles |
| 42 | 7.5A | VDC System Sensor, Steering Angle Sensor, ABS Control Unit |
| 43 | 30A | Windscreen, Rearscreen Washer (Two-Way Pump) |
| 44 | 20A | Cigar Lighter |
| 45 | 15A | Heated Seats |
| 46 | 15A | Sunroof |
| 47 | 20A | Driver’s Door Control Unit Supply |
| 48 | 20A | Passenger’s Door Control Unit Supply |
| 49 | 7.5A | Secondary Services, Control Lighting |
| 50 | 7.5A | Air Bag Control Unit |
| 51 | 7.5A | Selespeed Transmission |
| 52 | 15A | Rearscreen Wiper |
| 53 | 10A | Hazard Lights, +30 Direction Indicators, Instrument Cluster |
| 60 | 25A | ?→’08→?: Tailgate Electric Unlocking |
| 61 | 15A | ?→’08→?: Bose System |
| 62 | 15A | ?→’08→?: Bose System |
| 63 | 20A | ?→’08→?: Sunroof |
Engine Compartment Fuse Box
Access is gained to the control box next to the battery releasing the perimetral catches (A) and removing the protective cover (B).
| No. | Amps | Assignment/Designation |
| 1 | 50A | Diesel: Glow Plug Preheating |
| 2 | 50A | Dashboard Control Unit |
| 3 | 30A | Selespeed Transmission Pump |
| 4 | 60A | ’00→?: ABS Control Unit |
| 50A | ?→’08→?: ABS Control Unit | |
| 5 | 40A | Climate control fan |
| 6 | 40A | Diesel: Radiator Fan (First Speed) |
| 30A | Petrol: Radiator Fan (First Speed) | |
| 7 | 50A | Petrol: Radiator Fan (Second Speed) |
| 60A | Diesel: Radiator Fan (Second Speed) | |
| 8 | 30A | Additional Heater (PTC) |
| 9 | 20A | Headlight Washer |
| 10 | 15A | Horn |
| 11 | 15A | Secondary Services (Electronic Injection) |
| 14 | 10A | Right Main-Beam Headlight |
| 15 | 10A | Left Main-Beam Headlight |
| 16 | 7.5A | Electronic Injection System |
| 17 | 7.5A | Primary Services (Electronic Injection) |
| 18 | 7.5A | Electronic Injection Control Unit (+30) |
| 19 | 7.5A | Climate Control Compressor |
| 20 | 20A | Diesel: Heated Fuel Oil Filter |
| 21 | 15A | Fuel Pump, Ignition Coils |
| 22 | 15A | Petrol: Injectors |
| 20A | Diesel: Injectors | |
| 23 | – | – |
| 30 | 15A | Fog Lights |
| 10A | Fog Lights | |
| Relay | ||
| R2 | High Beam | |
| R3 | Horn | |
| R5 | Compressor | |
| R6 | Radiator Fan 1st Speed | |
| R7 | Radiator Fan 2st Speed | |
| R8 | Additional Heater (PTC) | |
| R9 | Fuel Injection Main | |
| R10 | Fuel Pump | |
| R14 | Fog Lamp | |
| R17 | Headlamp Washer | |
| R19 | Diesel: Heated Fuel Oil Filter | |
| R20 | – | |
Engine Compartment Fuse Box No.2 (only GTA (’00-’04))
| No. | Amps | Assignment/Designation |
| 1 | 7.5A | Compressor |
| 2 | 15A | High Beam |
| 3 | 15A | Horn |
| 4 | 15A | Fuel Pump |
| 5 | 20A | Headlight Washer |
| 6 | 7.5A | Electronic Injection System |
| 7 | 15A | Fog Lights |
| 8 | 7.5A | Primary Services (Electronic Injection) |
| 9 | 15A | Secondary Services (Electronic Injection) |
| 10 | 15A | Coils, Injectors |
| 11 | 7.5A | 15/54 |
| 12 | 7.5A | Electronic Injection System (15/54) |
| Relay | ||
| R2 | High Beam | |
| R3 | Horn | |
| R5 | Compressor | |
| R9 | Injectors | |
| R10 | Fuel Pump | |
| R14 | Fog Lights | |
| A | Radiator Fan Relay No.1 | |
| B | Radiator Fan Relay No.2 | |
| C | Radiator Fan Relay No.2 | |
| D | Selespeed Pump | |
Control Box on Battery Positive Pole
To gain access to the fuses in the fusebox on the battery post, remove the protective cover by pressing the opening catches (front).
| No. | Amps | Assignment/Designation |
| 70 | 125A | Petrol: Engine Compartment Control Box |
| 150A | Diesel: Engine Compartment Control Box | |
| 71 | 70A | Dashboard Control Unit |
| 72 | 30A | Ignition Switch |
| 73 | 30A | Additional Heater |
Conclusion
The Alfa Romeo 147 is a popular car in its day, and it still has a loyal following today. Its distinctive design and Italian flair helped it to stand out in a crowded market. However, like any car, it requires regular maintenance and occasional repairs. Understanding the car’s electrical components, such as the fuse box and relay, can help owners keep their Alfa Romeo 147 in top condition. With proper care, this car can provide years of driving pleasure.
