Lancia THESIS. Service Manual - part 18

284

IF AN EXTERIOR
BULB BURNS OUT

FRONT LIGHT CLUSTER

The front light cluster includes

main beam headlights/dipped beam
headlights, additional main beam
headlights, direction indicators and
sidelights.

Light layout is the following 

(fig. 23):

A – Main beam headlight/dipped

beam headlight (bi-Xeno bulb)

B – Sidelight

C – Additional main beam head-

light

D – Direction indicator.

Any operation on the

front light cluster must be
made with the stalk at 0

(lights off) and ignition key
removed for at least 15 minutes
(to let bulb cooling and con-
densers discharging): risk of elec-
trical discharge! 

fig. 23

L0A0106b

To replace front head-

light bulbs, front light
clusters shall be removed.

It is therefore recommended to
the bulbs replaced at Lancia
Dealership.

Due to high voltage, the

bulb of bi-Xeno gas-dis-
charge headlights must

only be replaced by experts: dan-
ger of death! Contact the Lancia
Dealership.

285

SIDE DIRECTION INDICATORS
(fig. 25)

To replace the bulb:

1) Push the lens in direction 1,

press tab A and remove the cluster
from the back 2.

2) Turn the direction indicator

anticlockwise and remove the bulb
holder B.

3) Remove bulb C and replace it.

4) Refit the direction indicator in

the bulb holder turning it clockwise.

5) Refit the direction indicator on

the fender first inserting the front
part and then pressing the rear part
until it fits.

If the front fog lights are

not adjusted properly,
they could annoy other

drivers. Contact a Lancia
Dealership for a check and any
required adjustments.

fig. 24

L0A0154b

fig. 25

L0A0121b

FRONT FOG LIGHTS (where
provided) (fig. 24)

To replace front fog lights it is nec-

essary to operate under the vehicle,
after removing the protective cover
under the engine. For this reason, it
is suggested to have the bulbs
replaced at a Lancia Dealership.

286

REAR LIGHT CLUSTER (fig. 26)

Taillights, direction indicators and

brake lights consists of leds built-
into the rear light cluster. 

If the lights break down partially

or completely go to a Lancia
Dealership.

REVERSING LIGHT AND REAR
FOG LIGHTS

Reversing lights and rear fog lights

are housed in the tailgate.

To replace the bulbs:

1) Open the tailgate and lift the

covering A (fig. 27) near the bulb to
be replaced.

2) Loosen the screw B and remove

the bulb holder C.

3) Remove the clipped in glass

bulbs (fig. 28).

D - B type, 12V-P21W bulb for

reversing light.

E - B type, 12V-P21W bulb for

rear fog light.

4) After replacing the bulbs, refit

the bulb holder and fasten it with
the screw.

5) Lower the tailgate cover.

fig. 26

L0A0123b

fig. 27

L0A0124b

fig. 28

L0A0125b

287

NUMBER PLATE LIGHTS 
(fig. 29)

To replace the bulb:

1) Remove the lens using a screw-

driver as a lever in point A.

2) Remove the bulb B by releasing

the side contacts and then replace it.

3) Refit the lens by inserting it first

from side C and then by pressing it
on the other side until it fits.

ADDITIONAL BRAKE LIGHT
(THIRD BRAKE LIGHT) (fig. 30)

If the third brake light breaks

down partially or completely go to a
Lancia Dealership.

IF AN INTERIOR
BULB BURNS OUT

FRONT CEILING LIGHT

To replace the bulbs:

1) Remove the clipped in caps A

and B (fig. 31) by levering with a
screwdriver on the external part.

fig. 29

L0A0126b

fig. 30

L0A0287b

fig. 31

L0A0129b

288

2) Loosen the screws C (fig. 32)

and remove the ceiling light.

3) To remove bulb holders turn

them anticlockwise (fig. 33).

D - Central ceiling light bulb.

E - Courtesy light bulbs.

4) Remove the clipped in glass

bulbs from the bulb holder and
replace them.

5) Insert the bulb holders and turn

them clockwise.

6) Refit the ceiling light and secure

it with the screws.

7) Refit the clipped in caps.

IMPORTANT When refitting the

ceiling light check that the electrical
wires are positioned correctly.

REAR CEILING LIGHT

To replace the bulbs:

1) Remove the ceiling light by lev-

ering with a screwdriver on the front
edge (fig. 34).

2) To remove bulb holders turn

them anticlockwise (fig. 35).

fig. 32

L0A0130b

fig. 33

L0A0131b

fig. 34

L0A0288b

289

A - Central ceiling light bulb.

B - Courtesy light bulbs.

3) Remove clipped in glass bulbs

from the bulb holders and replace
them.

4) Insert the bulb holders and turn

them clockwise.

5) Refit the ceiling light by insert-

ing first the rear part and then
pressing the front part until it fits.

IMPORTANT When refitting the

ceiling light check that the electrical
wires are positioned correctly.

GLOVE COMPARTMENT LIGHT

To replace the bulb:

1) Remove the lens by using a

screwdriver as a lever on clip A
(fig. 36).

2) Press the two sides of shield B

(fig. 37) at the fastening clips and
turn it.

3) Replace the clipped in bulb C.

4) Close the shield B by clipping it

into its housing.

5) Refit the lens by inserting side D

(fig. 36) first and then pressing the
other side to engage clip A.

fig. 37

L0A0135b

fig. 36

L0A0134b

fig. 35

L0A0133b

290

COURTESY MIRROR LIGHTS

To replace the courtesy mirror

bulbs:

1) Lift the mirror cover A (fig. 38).

2) Remove the mirror by levering

in B.

IMPORTANT Be very careful

when removing the mirror to avoid
damaging its frame and the mirror
itself.

3) Remove the bulbs C (fig. 39)

releasing them from the side con-
tacts and replace them.

4) Refit the mirror inserting first

the upper edge and then pressing the
lower edge until it fits.

BOOT LIGHT

To replace the bulb:

1) Remove the lens by using a

screwdriver as a lever on clip A
(fig. 40).

2) Press the two sides of shield  B

(fig. 41) at the fastening clips and
remove it.

fig. 38

L0A0136b

fig. 39

L0A0137b

fig. 40

L0A0139b

291

3) Replace the clipped in bulb C .

4) Close the shield by clipping it

into its housing.

5) Refit the lens by inserting side D

first and then pressing the other side
to engage clip A.

DOOR LIGHTS (fig. 42)

To replace the bulb:

1) Remove the lens by using a

screwdriver as a lever on clip A.

2) Press the two sides of shield B at

the fastening clips and turn it.

3) Replace the clipped in bulb C.

4) Close the shield B by clipping it

into its housing.

5) Refit the lens by inserting side D

first and then pressing the other side
to engage clip A.

DOOR MIRROR LIGHTS 
(fig. 43)

To replace the bulb:

1) Remove the lens by using a

screwdriver as a lever on clip A.

2) Remove the bulb holder B by

turning it anticlockwise. 

3) Replace the clipped in bulb C.

4) Insert the bulb holder and turn

it clockwise. 

5) Refit the lens by inserting side D

first and then pressing the other side
to fit it. 

fig. 42

L0A0138b

fig. 43

L0A0141b

fig. 41

L0A0140b

292

IF A FUSE BLOWS

GENERAL (fig. 67)

The fuse is a protective device for

the electric system. It comes into
action (i.e. it cuts off) in the event of
a failure or improper actions on the
electric system.

If an electrical device is not work-

ing, check whether the respective
fuse is blown. The conductor should
not be broken. If it is, replace it with
another with the same amperage
(same colour).

A - Undamaged fuse

B - Fuse with broken filament.

Use the tongs C to extract a fuse to

be replaced. The tongs are to be
found in the main fuse box.

Before changing a fuse,

check the ignition key has
been removed and that all

the other electrical devices have
been switched off.

fig. 67

L0A0127b

Never replace a fuse

with metal wires or any-
thing else. Always use an

intact fuse of the same colour
(same value).

Never change a fuse with

another of higher amper-
age: FIRE RISK!

If a general fuse (MIDI-

FUSE or MEGA-FUSE)
blows, do not repair it,

but go to a Lancia Dealership.

If the fuse blows again,

have the car inspected at a
Lancia Dealership.

293

FUSE LOCATION

The main fuses of THESIS are con-

tained into four fuse boxes, to be
found on the left side of the dash-
board, in the engine compartment,
on the battery and in the right side
compartment of the boot.

GENERAL FUSES 
(MIDI-FUSE and MEGA-FUSE)

The car is fitted with a set of gen-

eral fuses (MIDI-FUSE and MEGA-
FUSE) which separately protect the
various electrical system functions in
addition to the individual device
fuses.

The general fuses are located in the

left side of the boot in a fusebox direct-
ly connected to the  positive battery
terminal.

To reach the fuses:

1) Open the tailgate.

2) Loosen knob A (fig. 68) and

remove the battery cover B.

3) Press tabs A (fig. 69) and

remove the cover B.

The systems and devices protected

by the general fuses (fig. 70) are
listed on the following pages.

fig. 68

L0A0030b

fig. 69

L0A0031b

fig. 70

L0A0142b

294

FUSES IN THE DASHBOARD

The fuses protecting the main

devices are arranged in a fusebox
located under the dashboard, on the
left of the steering column, behind
the glove compartment (fig. 72).

To reach the fuses open the glove

compartment A (fig. 71) and then
remove it by loosing the two screws B
with a screwdriver. After replacing
the fuses, refit the glove compart-
ment and secure it by the two screws.

The fusebox also contains tongs for

removing the fuses.

Spare fuses A (fig. 72) are housed in

horizontal position in the upper part of
the fusebox. The spare fuse present
various amperages.

The devices protected by the fuses

(fig. 73) are listed in the tables on
the following pages.

IMPORTANT

Remember to

replace the spare fuse after replacing
a fuse.

FUSES IN THE ENGINE COM-
PARTMENT

The fusebox is located on the left

side of the engine compartment. 

To reach the fuses remove the

cover A (fig. 74) after releasing the
fastening clips B.

fig. 71

L0A0144b

fig. 72

L0A0143b

fig. 73

L0A0265b

fig. 74

L0A0145b

295

The devices protected by the fuses 

(fig. 75) are listed in the tables on
the following pages.

After replacing the fuses refit the

cover by refitting the fastening clips.

FUSES IN THE BOOT

The fusebox (fig. 77) is located on

the right side of the boot, inside the
service compartment. 

To open the compartment flap turn

the catch A (fig. 76) to 1 with the
ignition key and lower it. 

The spare fuses, with different

amperage, are housed in vertical
position at the sides of the fusebox.

The devices protected by the fuses 

(fig. 78) are listed in the tables on
the following pages.

fig. 75

L0A0267b

fig. 76

L0A0275b

fig. 77

L0A0146b

fig. 78

L0A0266b

296

MIDI-FUSE and MEGA-FUSE

Dashboard fusebox 1

Dashboard fusebox 2

Boot fusebox

Engine compartment fusebox

Fuse

1

2

3

4

Ampere

70

50

60

150

Location

fig. 70

fig. 70

fig. 70

fig. 70

Exterior lights

External light control (twilight sensor adjustment)

Direction indicators

Right-hand main beam headlight

Left-hand main beam headlight

Right-hand dipped beam headlight

Left-hand dipped beam headlight

Reversing light

Third brake light

Hazard lights

Front fog lights

Fuse

23

16

8

10

24

25

21

14

16

14

Ampere

7.5

10

10

10

15

15

7.5

10

10

15

Location

fig. 73

fig. 73

fig. 75

fig. 75

fig. 73

fig. 73

fig. 73

fig. 73

fig. 73

fig. 75

297

Interior lights

Boot ceiling light

Passenger compartment rear ceiling light

Door puddle lights

(*) As an alternative for certain versions/markets

Fuse

19 (*)
13 (*)

19 (*)
13 (*)

19 (*)
13 (*)

Ampere

10
10

10
10

10
10

Location

fig. 78
fig. 73

fig. 78
fig. 73

fig. 78
fig. 73

Fuse

1-6-8-12-17-18-21-23

22

18

9

5

7

3

11

19

21

14

25

1

15

Ampere

–

20

7.5

20

20

25

25

20

15

7.5

10

15

10

7.5

Location

fig. 78
fig. 73

fig. 73

fig. 73

fig. 73

fig. 78

fig. 73

fig. 78

fig. 75

fig. 73

fig. 73

fig. 73

fig. 73

fig. 73

Devices and utilities

Available

Cigar lighter

Air bag

Power supply point boot 1

Power supply point boot 2

Amplifier for sound system with HI-FI system

Rear head restraints (tilting)

Boot (electrified lock actuator)

Spark plugs (petrol versions) 

Engine compartment relay coils

Headlight beam adjustment control unit

Trailer control unit (presetting)

Power steering control unit

298

Devices and utilities

Horn

Windscreen wiper controls

Brake light control (NC)

Brake light control (NA)

Ignition switch

Air conditioner compressor

Cruise Control (satellite controls)

Cruise Control (Adaptive point)

Climate control system fan

Engine cooling electric fan (first) 

Engine cooling electric fan (second) 

Right-hand headlight (control unit)

Left-hand headlight (control unit)

Diesel fuel filter (PTC)

Electronic injection system

Injectors (diesel versions) 

Driving position point interface

Automatic transmission point interface

Climate control system point interface

Fuse

11

23

20

14

7

12

20

20

5

3

4

10

10

16

13

19

14

15
23

6

15

Ampere

15

7.5

7.5

10

20

7.5

7.5

7.5

40

60

20

7.5

7.5

20

7.5

20

20

10

7.5

10

7.5

Location

fig. 75

fig. 73

fig. 73

fig. 73

fig. 75

fig. 75

fig. 73

fig. 73

fig. 75

fig. 75

fig. 78

fig. 78

fig. 78

fig. 75

fig. 75

fig. 75

fig. 78

fig. 78
fig. 73

fig. 73

fig. 73

299

Devices and utilities

Engine control system point interface

Brake system point interface

Headlight washers

Heated rear window

Automatic gearbox starter

NIM

Passenger position point

Steering lock point

Brake Assistant point

(*) As an alternative for certain versions/markets

Braking system point (NFR 1)

Braking system point (NFR 2)

Infotelematic point

Yaw Lateral point

(*) As an alternative for certain versions/markets

Keyless System point

Driver door point

Driver door point (power supply)

Passenger door point

Fuse

22

29

15

17

17

6

14

22

19 (*)

13 (*)

19

1

6

6

19 (*)

13 (*)

19

22

11

8

11

23

Ampere

7.5

7.5

20

30

30

10

10

10

10

10

7.5

40

40

10

10

10

7.5

10

20

20

20

7.5

Location

fig. 75

fig. 73

fig. 75 

fig. 73

fig. 75

fig. 73

fig. 78

fig. 78

fig. 78

fig. 73

fig. 73

fig. 75

fig. 75

fig. 73

fig. 78

fig. 73

fig. 73

fig. 78

fig. 78

fig. 73

fig. 78

fig. 73