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Fuse box diagram (fuse layout), location, and assignment of fuses and relays Alfa Romeo 166 (1999, 2000, 2001, 2002, 2003).
Checking and Replacing Fuses
The fuse is a protective device for the electric system: it comes into action (i.e. it cuts off) mainly due to a fault or improper action on the system. When a device does not work, check the efficiency of its fuse. The conductor element must be intact; if not, replace the fuse with one of the same amp rating (same colour).
Note
- Before replacing a fuse, make sure the ignition key has been removed and that all the other services are switched off and/or disengaged.
- Never replace a damaged fuse with anything other than an intact fuse.
- Never replace a fuse with another with a higher amp rating; DANGER OF FIRE.
- If a fuse blows again, contact an Alfa Romeo Authorised Service.
This model is fitted with two junction units: a main junction unit (1) located underneath the dashboard to the left of the steering column and an auxiliary junction unit (2) positioned in the engine compartment.
Passenger Compartment Fuse Box Diagram
The fuses for the main devices are housed in a control unit under the dashboard, to the left of the steering column. Access to it is gained slackening the knob (A) and lowering the panel (B). In the upper part of the control unit there is a pincer (C) for removing fuses.
| № | A | Function |
|---|---|---|
| 1 | 15 | Brake Lights, IGE Control Unit, Brake Depressed Light Control Signal, Control Panel, Direction Indicators (Steering Column Switch Unit), Exterior Lights Control |
| 2 | 10 | Air Bag Control Unit, Gearshift Lever |
| 3 | 5 | Fuel Pump |
| 4 | 15 | Radio |
| 5 | 10 | Mobile Phone, Glove Compartment Light, Cruise Control, Gear Lever Panel (CAE), Light Dimmer, Door Opening Receiver, Heated, Fold-Down Door Mirrors, Antitheft Control Unit, Switch On Console (C.M.), Compressor Relay Coil, Symbols (Switches/Buttons), I.C.S. System, Sound System Controls on Steering Wheel |
| 6 | 5 | Climate Control Fan Relay Coil |
| 7 | 10 | Front Current Socket (Cigar Lighter), I.C.S. System |
| 8 | 10 | Direction Indicators and Hazard Warning Lights, Right Side Lights |
| 9 | 5 | Electrochromic Mirror, Rain Sensor, Preparation for Telepass, Relay Coil for Seat Heat Pad Control, Signal to Front Electric Window Control Unit, Signal to Rear Electric Window Control Unit, Climate System Controls, Rear Electric Window Switch Inhibition Light |
| 10 | 5 | CAE Control Unit, Electronic Automatic Gearbox (Control Unit, Sensors and Gearshift Lever) |
| 11 | 20 | IGE Control Unit |
| 12 | 20 | Headlamp Washer |
| 13 | 15 | Sun Roof, Reversing Light Signal for Electrochromic Mirror |
| 14 | 25 | Windscreen Wash/Wiper |
| 15 | 25 | Motor for Right/Left Front Electric Windows |
| 16 | 5 | Alfa Romeo Code System, Electronic Injection System, Engine Cooling Control Unit, Compressor Relay, Electronic Automatic Gearbox, Fuel Pump Relay Coil (Engine Bay Box) |
| 17 | 10 | Transmission Lever Panel (CAE), Passegner Compartment Courtesy Light, Door Lights, Boot Light, Glove Compartment Light, Light Dimmer, Climate Control System Control Unit, Antitheft Control Unit, Remote Control Receiver, Diagnostic Socket |
| 18 | 5 | Instrument Panel, I.C.S. System, Preparation for Mobile Phone, EOBD System (Diagnostic Socket), Navigator |
| 19 | 25 | Central Locking Motor, Additional Current Socket |
| 20 | 5 | Alfa Romeo Code System - Injection (Petrol) |
| R1 | Ignition Discharge | |
| R2 | Direction Indicators/Hazard Warning Lights Flasher | |
| R3 | Headlamp Washer Intermittent | |
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Engine Compartment Fuse Box Diagram
| № | A | Function |
|---|---|---|
| 1 | 10 | Right Main Beam Headlamp |
| 2 | 10 | Left Main Beam Headlamp |
| 3 | 15 | Fog Light |
| 4 | 15 | Horns |
| 5 | 10 | Air Conditioning Compressor |
| 6 | 10 | Left Dipped Headlamp |
| 7 | 10 | Right Dipped Headlamp |
| 8 | 50 | High Speed Radiator Fan |
| 9 | 50 | Low Speed Radiator Fan |
| R1 | Dipped Beam Headlamps | |
| R2 | Horns | |
| R3 | Air Conditioning Compressor | |
| R4 | Main Beam Headlamps | |
| R5 | Fog Light | |
| R6 | High Speed Radiator Fan | |
| R7 | Low Speed Radiator Fan | |
Additional Fuses
| № | A | Function |
|---|---|---|
| 1 | 80 | JTD: Plug Preheating Control Unit |
| 2 | 30 | Ignition Coils, Fuel Injection Main Relay, Fuel Pump Relay, Engine Management Control Unit, Fuel Injection Control Unit Supply Relay, Fuel Injection Services Supply Fuse |
| 3 | 30 | JTD: Additional Heater |
| 4 | 15 | JTD: Diesel Pre-Heating |
| 5 | 30 | Starter |
| 7 | 60 | ABS |
| 8 | 40 | 2001-2003: Radiator Fan |
| 9 | 30 | Vehicle Interior Fan |
| 10 | 5 | CAE Supply |
| 11 | 10 | ABS |
| 12 | 7.5 | JTD: Engine Management Control Unit |
| 13 | 20 | 2002-2003: Cigar Lighter |
Luggage Compartment Fuses
| № | A | Function |
|---|---|---|
| 1 | 40 | Heated Rear Window |
| 2 | 25 | Fuel Flap Opening |
| 3 | 20 | Boot Opening |
| 4 | 30 | Left Seat Adjustment |
| 5 | 20 | Seat Heating |
| 6 | 30 | Right Seat Adjustment |
| 7 | 15 | Trailer |
| 8 | 25 | Rear Electric Windows |
| - | 125/150 | Main Fuse |
| - | 60 | Luggage Fuses |
| ACC | 30 | Ignition Switch |
| Centr | 60 | Fuse: "8", "10", "11", "12", "15", "17", "18", "19", "20", Ignition Discharge Relay, Vehicle Interior Fan Fuse |
| - | 15 | Radio Amplifier |
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