Alfa Romeo 166 facelifting (2003-2007) – fuse and relay box

Diagrams of fuse boxes and relays – Alfa Romeo 166

Applies to vehicles manufactured in the years:

2003, 2004, 2005, 2006, 2007.

The lighter in the Alfa Romeo 166 is responsible for the fuse 7 in the fuse box in the trunk.

READ:  Alfa Romeo 156 Crosswagon (2004-2008) - fuse box

Fuses and relays in the control unit

Alfa Romeo 166 facelifting (2003-2007) - fuse and relay box
Alfa Romeo 166 – fuses – control unit

The fuses for the main devices are located in the control unit under the dashboard, on the left side of the steering column.

Fuses and relays in the engine compartment

Alfa Romeo 166 facelifting (2003-2007) - fuse and relay box
Alfa Romeo 166 – fuses – engine compartment
Number Description
A Dipped beam
B Air conditioning fan
C. Horn
D Front fog lamp
E. Petrol versions (single fan):

engine radiator (high speed)

JTD versions (with two fans):

engine radiator (high speed).

F. Conditioner compressor
H. Petrol versions:

engine radiator (low speed).

JTD versions (with two fans):

engine radiator (high speed).

L . Fuel pump
M. Electronic main injection relay
N Starter
P. Heating of the diesel fuel filter

(JTD versions).

JTD versions (with two fans):

engine radiator (low speed).

Fuses and relays in the trunk

Alfa Romeo 166 facelifting (2003-2007) - fuse and relay box
Alfa Romeo 166 – fuses – trunk
Number Description
A Air mixing actuator;

Air conditioner;

Additional heater control

(JTD versions).

B Rear window heater relay
C. Seat heating control;

Electrochromic road mirror;

Visor;

Rain sensor;

Parking sensor control unit;

Side mirror indicator light;

Remote control receiver;

Alarm system control unit;

Driver’s window control LOCK warning light.

D Windshield heating;

Defrosting the exterior mirrors.

E. Front Seat heating;

Rear current socket;

Electric adjustment of the front seats;

Electrically operated sunroof.

F. Direction indicators;

Pre-setting the trailer.

Summary of the fuse table

External lighting Number Amperes [A] location
Brake lights (switch) 9 5 86
1 15 86
Direction indicators 12 10 93
Exterior lighting (control) 5 10 86
Front fog lamps 16 15 89
Headlamps and headlamp position sensor

(gas-discharge headlamps)

6 7.5 86
IGE control unit:
– brake light switch 1 15 86
– brake lights 9 5 86
– reflector 11 15 86
– left position lights 17 10 86
– rear lamp units 15 10 86
– right position lights 8 10 86
Left low beam 12 15 89
Reversing lamps

(only versions with manual gearbox)

13 10 86
Right low beam 10 15 89
Indoor lighting Number Amperes [A] location
Dashboard lighting dimmer 5 10 86
Side mirror indicator light 15 10 93
Glove box lighting 5 10 86
Seat heating indicator light 15 10 93
Sun visor lighting 15 10 93
System / Component Number Amperes [A] location
ABI control unit 13 10 86
ABI control unit –

Central lock

19 20 93
ABI control unit –

Left windscreen

18 20 93
ABI control unit –

Right windscreen

3 20 93
ABI control unit –

Left rear window

14 20 93
ABI control unit –

Rear right 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
Mobile phone (handset) 18 5 86
5 10 86
Central lock

(ABI control unit)

19 20 93
Lighter 7 20 86
Air conditioning fan 2 30 89
Climate control unit 19 5 86
Conditioner compressor 13 7.5 89
Cruise control 5 10 86
Heating of the diesel fuel filter

(JTD versions)

23 30 89
5 40 89
Defrosting the exterior mirrors 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 controller 16 5 86
Engine radiator fan 4 60 89
Engine radiator fan 5 40 89
EOBD system (socket) 18 5 86
Left windscreen

(ABI control unit)

18 20 93
Right windscreen RH

(ABI control unit)

3 20 93
LH electric front Seat adjustment 6 30 93
Front right electric Seat adjustment 5 30 93
Warming of the front Seat on the left side 9 10 93
Front right Seat heating 8 10 93
Fuel pump 19 15 89
Fuel pump relay coil

(engine box)

16 5 86
Glow plug (JTD versions) 8 60 89
Headlight washer (intermittent) 12 20 86
Horns 11 15 89
ICS 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
Electrically operated windows

(LOCK indicator lamp)

15 10 93
Electric sunroof 10 20 93
Initial setting 4 93
11 93
Rain sensor 15 10 93
Rear power socket 16 20 93
Left rear window (ABI control unit) 14 20 93
Right rear power window

(ABI control unit)

17 20 93
Rear window heating 1 30 93
T21, T22, T23 relay coil (trunk) 3 5 86
T24 relay coil (trunk) 5 10 86
Receiving remote control 15 10 93
Sound amplifier 20 25 93
Sound system 4 15 86
Steering wheel sound system controls. 5 10 86
Starter 1 30 89
Initial setting of the trailer 12 10 93
Windscreen heating 7 15 93
Wipers 14 25 86

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