Alfa Romeo 166 FL (2003 – 2007) – fuse box diagram
Year of production: 2003, 2004, 2005, 2006, 2007
Fuses and relays in the control unit
The fuses for the main devices are housed in a control unit under the dashboard, to the left of the steering column.
Fuses and relays in engine compartment
| Relays | Description |
| A | Dipped beam headlight |
| B | Climate control fan |
| C | Horn |
| D | Front fog light |
| F | Petrol versions (single fan): engine cooling radiator (high speed) |
| JTD versions (two-fan): engine cooling radiator (high speed | |
| G | Conditioner compressor |
| H | Petrol versions: engine cooling radiator (low speed) |
| JTD versions (two-fan): engine cooling radiator (high speed) | |
| L | . Fuel pump |
| M | Electronic injection main relay |
| N | Starter motor |
| P | Diesel filter warming (JTD versions) |
| JTD versions (two-fan): engine cooling radiator (low speed) |
Fuses and relays in the boot
| Relays | Description |
| A | Air mixing actuator, climate control unit, additional heater control (JTD versions) |
| B | Rearscreen heating relay |
| C | Seat warming control, electrochromic driving mirror, sun visor light, rain sensor, parking sensor control unit, door mirror control light, remote control receiver, alarm system control unit, driver’s power window control LOCK warning light |
| D | Windscreen heating, door mirror defrosting |
| E | Front seat warming, rear current socket, front seat electric adjustment, powered sunroof |
| F | Direction indicators, trailer presetting |
Fuse table summary
| External lights | Fuse | Ampere rating [A] | Location |
| Brake lights (switch) | 9 | 5 | 86 |
| 1 | 15 | 86 | |
| Direction indicators | 12 | 10 | 93 |
| External lights (control) | 5 | 10 | 86 |
| Front fog lights | 16 | 15 | 89 |
| Headlights and headlight position sensor (gas discharge headlights) | 6 | 7,5 | 86 |
| IGE control unit: | |||
| – brake light switch | 1 | 15 | 86 |
| – brake lights | 9 | 5 | 86 |
| – headlight spot | 11 | 15 | 86 |
| – left side lights | 17 | 10 | 86 |
| – rear light units | 15 | 10 | 86 |
| – right side lights | 8 | 10 | 86 |
| Left dipped beam headlight | 12 | 15 | 89 |
| Reversing lights (only versions with manual gearbox) | 13 | 10 | 86 |
| Right dipped beam headlight | 10 | 15 | 89 |
| Internal lights | Fuse | Ampere rating [A] | Location |
| Dashboard light dimmer | 5 | 10 | 86 |
| Door mirror control light | 15 | 10 | 93 |
| Glovebox light | 5 | 10 | 86 |
| Seat warming control light | 15 | 10 | 93 |
| Sun visor lights | 15 | 10 | 93 |
| System/component | Fuse | Ampere rating[A] | Location |
| ABI control unit | 13 | 10 | 86 |
| ABI control unit – Central locking | 19 | 20 | 93 |
| ABI control unit – Front LH power window | 18 | 20 | 93 |
| ABI control unit – Front RH power window | 3 | 20 | 93 |
| ABI control unit – Rear LH power window | 14 | 20 | 93 |
| ABI control unit – Rear RH power window | 17 | 20 | 93 |
| ABS control unit | 9 | 5 | 86 |
| 7 | 40 | 89 | |
| 3 | 40 | 89 | |
| Additional heater (JTD versions) | 17 | 20 | 89 |
| 13 | 10 | 93 | |
| Alarm system (control unit) | 12 | 10 | 93 |
| 15 | 10 | 93 | |
| Alfa Romeo Code System | 20 | 5 | 86 |
| 16 | 5 | 86 | |
| Cell phone (handset) | 18 | 5 | 86 |
| 5 | 10 | 86 | |
| Central locking (ABI control unit) | 19 | 20 | 93 |
| Cigar lighter | 7 | 20 | 86 |
| Climate control fan | 2 | 30 | 89 |
| Climate control unit | 19 | 5 | 86 |
| Conditioner compressor | 13 | 7,5 | 89 |
| Cruise Control | 5 | 10 | 86 |
| Diesel fuel filter warming (JTD versions) | 23 | 30 | 89 |
| 5 | 40 | 89 | |
| Door mirror defrosting | 2 | 7,5 | 93 |
| Electrochromic driving mirror | 15 | 10 | 93 |
| Electronic injection control unit | 20 | 10 | 89 |
| 21 | 15 | 89 | |
| 22 | 20 | 89 | |
| Electronic injection system | 16 | 5 | 86 |
| Engine control unit | 18 | 7,5 | 89 |
| Engine cooling control unit | 16 | 5 | 86 |
| Engine cooling radiator fan | 4 | 60 | 89 |
| Engine cooling radiator fan | 5 | 40 | 89 |
| EOBD system (socket) | 18 | 5 | 86 |
| Front LH power window (ABI control unit) | 18 | 20 | 93 |
| Front RH power window (ABI control unit) | 3 | 20 | 93 |
| Front LH seat electric adjustment | 6 | 30 | 93 |
| Front RH seat electric adjustment | 5 | 30 | 93 |
| Front LH seat warming | 9 | 10 | 93 |
| Front RH seat warming | 8 | 10 | 93 |
| Fuel pump | 19 | 15 | 89 |
| Fuel pump relay coil (engine bay box) | 16 | 5 | 86 |
| Glow plug (JTD versions) | 8 | 60 | 89 |
| Headlight washer (intermittent) | 12 | 20 | 86 |
| Horns | 11 | 15 | 89 |
| I.C.S. system | 5 | 10 | 86 |
| 6 | 7,5 | 86 | |
| 7 | 20 | 86 | |
| 18 | 5 | 86 | |
| Instrument panel | 6 | 7,5 | 86 |
| 18 | 5 | 86 | |
| Navigator | 18 | 5 | 86 |
| Parking sensors (control unit) | 15 | 10 | 93 |
| Power windows (driver’s control LOCK warning light) | 15 | 10 | 93 |
| Powered sunroof | 10 | 20 | 93 |
| Presetting | 4 | — | 93 |
| 11 | — | 93 | |
| Rain sensor | 15 | 10 | 93 |
| Rear current socket | 16 | 20 | 93 |
| Rear LH power window (ABI control unit) | 14 | 20 | 93 |
| Rear RH power window (ABI control unit) | 17 | 20 | 93 |
| Rearscreen heating | 1 | 30 | 93 |
| Relay coil T21, T22, T23 (boot box | 3 | 5 | 86 |
| Relay coil T24 (boot box) | 5 | 10 | 86 |
| Remote control receive | 15 | 10 | 93 |
| Sound amplifier | 20 | 25 | 93 |
| Sound system | 4 | 15 | 86 |
| Sound system controls on steering whee | 5 | 10 | 86 |
| Starter motor | 1 | 30 | 89 |
| Trailer presetting | 12 | 10 | 93 |
| Windscreen heating | 7 | 15 | 93 |
| Windscreen wiper | 14 | 25 | 86 |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.