2006 Alfa Romeo 166 headlights

149
Useless loads
Do not overload the boot (especially in
town), as this will heavily affect fuel con-
sumption and stability of the vehicle.
Roof rack/ski rack
Remove the roof rack or ski rack imme-
diately after use. These accessories lower
air drag and adversely affect consumption
levels. For particularly bulky loads the use
of a trailer is preferable.
Electric services
Use electric devices only for the neces-
sary time. Rearscreen heating, additional
headlights, wipers and the heater fan
consume a considerable amount of ener-
gy, increasing the need for current highers
fuel consumption (up to +25% in the ur-
ban cycle).Climate control system
The climate control system is a further
load that weighs considerably on the en-
gine inducing higher consumption levels
(on average up to +20%). Outside tem-
perature permitting, preferably use the air
vents.
Spoilers
The use of spoilers that have not been
certified by Alfa Romeo can adversely af-
fect air drag and fuel consumption.DRIVING STYLE
Starting
Do not warm the engine stationary at i-
dle speed or high speed: in these condi-
tions the engine warms much more slow-
ly, increasing consumption and emissions.
It is therefore advisable to move off im-
mediately and slowly, avoiding high
speeds. This will warm up the engine
more quickly.
Pointless manoeuvres
Avoid revving the engine when waiting
at traffic lights and before switching the
engine off. This, like revving before
changing gear, serves absolutely no pur-
pose on modern cars and increases con-
sumption and emission levels.
Gearshifting
As soon as the road and traffic condi-
tions permit it, engage a higher gear. The
use of a low gear to obtain lively acceler-
ating increases fuel consumption.
In the same way, incorrect use of a gear
increases consumption, emission and en-
gine wear.

165
GENERAL INSTRUCTIONS
– When a light is not working check
that the corresponding fuse is intact be-
fore replacing the bulb.
– For the location of fuses, refer to the
paragraph “In the event of a burnt fuse”
in this chapter.
– Before changing a bulb check the
contacts for oxidation.
– Burnt bulbs must be replaced with
others of the same type and power.
– Always check the height of the head-
light beam after changing a bulb to en-
sure they are safe.
TYPES OF BULBS (fig. 23)
Various types of bulbs are fitted to your
vehicle.
A. All glass bulbs
These are pressure-fitted. Pull to re-
move.
B. Bayonet type bulbs
Press the bulb, turn counter-clockwise to
remove this type of bulb from its holder
C. Tubular bulbs
Free them from their contacts to re-
move.
D. Halogen bulbs
To remove free it from the clip on its
seating.IF ONE OF THE
EXTERNAL LIGHTS
GOES OUT
Alterations or repairs to
the electric system not
carried out correctly and without
taking into account the specifica-
tions of the system may cause
malfunctioning and the risk of fire.
WARNING
3045CAm
3054CAm
fig. 23 IMPORTANTThe headlight inner sur-
face might be slightly misted: this should
not be considered irregular but a natural
phenomenon due to low temperature and
the air humidity level. Misting will disap-
pear as soon as the headlights are turned
on. Drops inside the headlight mean wa-
ter infiltration: contact Alfa Romeo Autho-
rized Services.

166
BULBS TYPE W
LOW BEAM/HIGH BEAM (GAS DISCHARGE HEADLIGHTS) D (D1) 35
HIGH BEAM HEADLAMP SIGNALLER
(GAS DISCHARGE HEADLIGHTS) D (H1) 55
LOW BEAM (HALOGEN BULB HEADLIGHTS) D (H7) 55
HIGH BEAM (HALOGEN BULB HEADLIGHTS) D (H7) 55
FRONT SIDELIGHT B (H6W) 6
FOG LAMPS D (H3) 55
FRONT DIRECTION INDICATORS (COLOURED BULB) B (PY21W) 21
SIDE DIRECTION INDICATORS A (5W Amber) 5
REAR DIRECTION INDICATOR non-replaceable LEDs
STOP/SIDE LIGHT B (21/5W) 21/5
REVERSING LIGHT B (P21W) 21
REAR FOG GUARD B (P21W) 21
ADDITIONAL STOP LIGHT (3rd STOP) A (W2.3W) 2.3
REAR SIDE LIGHT (ON BOOT LID) B (R5W) 5
FRONT ROOF LIGHTS B (10W Halogen) 10
BOOT LIGHT C (10W) 10
GLOVEBOX AND DOOR LIGHTS A (W5W) 5
SUN VISOR LIGHT C (C5W) 5
NUMBER PLATE LIGHT A (W5W) 5
REAR ROOF LIGHTS B (HT5W Halogen) 5
Halogen bulbs must be
handled touching only
the metallic part. If the
transparent bulb is touched with
the fingers its lighting intensity
is reduced and the life of the bulb
may be compromised. If touched
accidentally, rub the bulb with a
cloth moistened with methylated
spirits and allow to dry.
Where possible the
bulbs should be re-
placed by Alfa Romeo
Authorized Services. The correct
operation and positioning of the
external lights are vital to the
safety of the vehicle and its pas-
sengers and the subject of specif-
ic laws.
Halogen bulbs contain
pressurised gas, in the
case of breakage they may burst.
WARNING

167
FRONT LIGHT UNITS - GAS
DISCHARGE HEADLIGHTS
(optional for versions/markets where
applicable)
The front light units with gas discharge
headlights contain low beam/high beam
(gas discharge), high beam headlamp
signaller (halogen), sidelight and direc-
tion indicator bulbs.
The bulbs are arranged inside the light
unit as follows (fig. 24-25):
A.Direction indicator
B.High beam headlamp signaller and
sidelight
C.Gas discharge low beam/high beam.Low beams/high beams
Xenon bulbs are very longlasting and
failure is highly unlikely.
The following paragraph describes how
to replace xenon bulbs correctly.
Any work on the front
light units should be car-
ried out with the light switch at
position 0 (lights off) and with the
ignition key removed from the
switch: danger of electric dis-
charge.
WARNING
If necessary, have the
system checked and if
necessary repaired only by Autho-
rized Alfa Romeo Services.
WARNING
A0D0064m
fig. 24
A0D0065m
fig. 25

171
Front direction indicators
To replace the bulb (Type B – PY21W,
21W, coloured):
– Remove the engine compartment cov-
er after turning the fastening pins.
– Turn counter-clockwise and remove
the bulb holder (A- fig. 35) without
disconnecting the connector.
– Remove the bulb (B- fig. 36) from
the bulb holder, pushing it slightly and
turning it counter-clockwise.– Fit the new bulb into the bulb holder,
pushing it slightly and turning it clock-
wise.
– Fit the bulb holder and lock it by turn-
ing it clockwise.
– Refit the engine compartment cover
and secure it by turning the fastening
pins.FRONT LIGHT UNITS –
HALOGEN BULB HEADLIGHTS
(optional for versions/markets where
applicable)
The front light units with halogen bulb
headlights contain low beam, high beam,
sidelight and direction indicator bulbs.
The bulbs are arranged inside the light
unit as follows (fig. 37-38):
A.Direction indicator
B.High beam headlight and sidelight
C.Low beam headlight.
A0D0070m
fig. 35
A0D0071m
fig. 36
A0D0054m
fig. 37

172
Low beam headlights
To replace the bulb (Type D – H7,
55W):
– Remove the engine compartment cov-
er after turning the fastening pins.
– Remove the rubber cap (A- fig.
39) by pulling the tab (B).
– Disconnect the snap-fitted connector
(C- fig. 40).
–- Release the clip (D).
– Remove the bulb (E- fig. 41).– Fit the bulb in the headlight reflector
making the notch coincide with the corre-
sponding groove.
– Lock the bulb with the clip.
– Fit the connector to the new bulb.
– Fit the rubber cap.– Refit the engine compartment cover
and secure it by turning the fastening
pins.
A0D0036m
fig. 38
A0D0072m
fig. 39
A0D0074m
fig. 41
A0D0073m
fig. 40

173
High beam headlights
To replace the bulb (Type D – H7,
55W):
– Remove the engine compartment cov-
er after turning the fastening pins.
– Turn counter-clockwise and remove
the direction indicator bulb holder (A-
fig. 42) without disconnecting the con-
nector to widen the working space.
– Remove the rubber cap (B) by
pulling the tab (C).– Disconnect the snap-fitted connector
(D- fig. 43) and release the clip (E).
– Remove the bulb (F- fig. 44).– Fit the new bulb in the headlight re-
flector making the notches coincide with
the corresponding grooves.
– Lock the bulb with the clip.
– Fit the connector to the bulb.
– Fit the rubber cap.
– Fit the direction indicator bulb holder
and lock it by turning it clockwise.
– Refit the engine compartment cover
and secure it by turning the fastening
pins.
A0D0075m
fig. 42
A0D0076m
fig. 43
A0D0077m
fig. 44

191
System/Component Fuse no. Ampere Location
ABI control unit 13 10A fig. 86
ABI control unit – Central locking 19 20A fig. 93
ABI control unit – Front LH power window 18 20Afig. 93
ABI control unit – Front RH power window 3 20A fig. 93
ABI control unit – Rear LH power window 14 20Afig. 93
ABI control unit – Rear RH power window 17 20Afig. 93
ABS control unit 9 5A fig. 86
7 40A fig. 89
3 40A fig. 89
Additional heater (JTD versions) 17 20A fig. 89
13 10A fig. 93
Alarm system (control unit) 12 10A fig. 93
15 10A fig. 93
Alfa Romeo Code System 20 5A fig. 86
16 5A fig. 86
Cell phone (handset) 18 5A fig. 86
5 10A fig. 86
Central locking (ABI control unit) 19 20A fig. 93
Cigar lighter 7 20A fig. 86
Climate control fan 2 30A fig. 89
Climate control unit 19 5A fig. 86
External lights Fuse no. Ampere Location
Brake lights (switch) 9 5A fig. 861 15A fig. 86
Direction indicators 12 10A fig. 93
External lights (control) 5 10A fig. 86
Front fog lights 16 15A fig. 89
Headlights and headlight position
sensor (gas discharge headlights) 6 7.5A fig. 86
IGE control unit:
- brake light switch 1 15A fig. 86
- brake lights 9 5A fig. 86
- headlight spot 11 15A fig. 86
- left side lights 17 10A fig. 86
- rear light units 15 10A fig. 86
- right side lights 8 10A fig. 86
Left dipped beam headlight 12 15A fig. 89
Reversing lights (only versions with
manual gearbox) 13 10A fig. 86
Right dipped beam headlight 10 15A fig. 89
Internal lights Fuse no. Ampere Location
Dashboard light dimmer 5 10A fig. 86
Door mirror control light 15 10A fig. 93
Glovebox light 5 10A fig. 86
Seat warming control light 15 10A fig. 93
Sun visor lights 15 10A fig. 93