Workshop Manuals Factory service & repair Lancia
01 General information02 Specifications03 Manufacturing data and tolerances04 Tightening torques05 Fluids and lubricants06 Maintenance07 Diagnostic checks08 Engine09 Clutch10 Gearbox and differential11 Axles and driveshafts12 Brakes13 Steering14 Suspension and wheels15 Heating, air conditioning and auxiliary units16 Electrical equipment17 Body fittings18 Body panels and frame19 Wiring diagrams and electrical functions20 Wiring harnesses21 Connectors and pin-outs22 Fault diagnosis23 Service news bulletins24 Special tools
Lancia Thesis Factory Service Manual (2002-2009)19 · Wiring diagrams and electrical functions
19 · Electrical

Brake lights operational description

Make
Lancia
Model
Thesis Factory Service Manual
Year
2002–2009
Section
Interior lighting › Brake lights operational description
Wiring diagrams and electrical functionsBrake lights operational description

BRAKE LIGHTS OPERATIONAL DESCRIPTION

2.0 TB, 2.4 20V

Operational Description

The switch I030 receives a supply controlled by the ignition (INT) from fuses F37 and F35 of the junction unit under the dashboard B002: when the brake pedal is pressed, the switch closes and sends the N.A. signal to the body computer M001, pin 2 connector H. N.C. and N.A. signals are sent, from pins 1 and 4 of the brake pedal switch I030, to pins 26 and 27, respectively, of the engine management control unit M010 connector A.

The key-on signal (INT) for the ignition switch H001 reaches the junction unit under the dashboard B002, at pin 11 of connector H and from there moves on to the body computer M001 pins 9 and 13 (the latter is protected by fuse F37) of connector H.

The Body Computer M001 controls the supply of the brake lights located in the light clusters F030 (left) and F031 (right) from pins 32 and 22, respectively of connector G.

The control unit inside left tail-light F031 communicates with the unit inside right tail-light F030 at pins 7 and 8 respectively and sends any fault signal to the Body Computer at pin 6 of connector A.

The switch I030 directly controls the centre rear light cluster F040 via the junction unit under the dashboard B002, pin 5 connector D.

The Body Computer M001 is connected, via the B-CAN, to the instrument panel E050 to manage the information shown on the display if there is a failure detected in the circuit.

The instrument panel receives a supply controlled by the ignition and a direct supply. These lines are protected by fuses F37 and F53, respectively of the junction unit under the dashboard B002.

The latter also receive a direct supply from the luggage compartment junction unit B045 because they are equipped with a control unit which controls the voltage/current for working at operating temperature.

Pins 8 and 9 of connector E of the Body Computer are earthed.

2.4 20V, 3.0 V6, 3.2 V6, 2.4 JTD 20V

Operational Description

The switch I030 receives a supply controlled by the ignition (INT) from fuses F37 and F35 of the junction unit under the dashboard B002.

N.C. and N.A. signals are sent from pins 1 and 2 of the brake pedal switch I030, respectively, to pins 80 and 17 of the engine management control unit M010 connector A which notifies the body computer M001 of the state of the contacts via the CAN.

The key-on signal (INT) for the ignition switch H001 reaches the junction unit under the dashboard B002, at pin 11 of connector H and from there moves on to the Body Computer M001 pins 9 and 13 (the latter is protected by fuse F37) of connector H.

The Body Computer M001 controls the supply of the brake lights located in the light clusters F030 (left) and F031 (right) from pins 32 and 22, respectively of connector G. The latter also receive a direct supply from the luggage compartment junction unit B045 because they are equipped with a control unit which controls the voltage/current for working at operating temperature.

The control unit inside left tail-light F031 communicates with the unit inside right tail-light F030 at pins 7 and 8 respectively and sends any fault signal to the Body Computer at pin 6 of connector A.

The switch I030 directly controls the centre rear light cluster F040 via the junction unit under the dashboard B002, pin 5 connector D.

The Body Computer M001 is connected, via the B-CAN, to the instrument panel E050 to manage the information shown on the display if there is a failure detected in the circuit.

The instrument panel receives a supply controlled by the ignition and a direct supply. These lines are protected by fuses F37 and F53, respectively of the junction unit under the dashboard B002.

Pins 8 and 9 of connector E of the body computer are earthed.

2.4 JTD 10V

Operational Description

The switch I030 receives a supply controlled by the ignition (INT) from fuses F37 and F35 of the junction unit under the dashboard B002: when the brake pedal is pressed, the switch closes and sends the N.A. signal to the body computer M001, pin 2 connector H. N.C. and N.A. signals are sent, from pins 1 and 4 of the brake pedal switch I030, to pins 54 and 59, respectively, of the engine management control unit M010 connector A.

The key-on signal (INT) for the ignition switch H001 reaches the junction unit under the dashboard B002, at pin 11 of connector H and from there moves on to the Body Computer M001 pins 9 and 13 (the latter is protected by fuse F37) of connector H.

The Body Computer M001 controls the supply of the brake lights located in the light clusters F030 (left) and F031 (right) from pins 32 and 22, respectively of connector G. The latter also receive a direct supply from the luggage compartment junction unit B045 because they are equipped with a control unit which controls the voltage/current for working at operating temperature.

The control unit inside left tail-light F031 communicates with the unit inside right tail-light F030 at pins 7 and 8 respectively and sends any fault signal to the Body Computer at pin 6 of connector A.

The switch I030 directly controls the centre rear light cluster F040 via the junction unit under the dashboard B002, pin 5 connector D.

The Body Computer M001 is connected, via the B-CAN, to the instrument panel E050 to manage the information shown on the display if there is a failure detected in the circuit.

The instrument panel receives a supply controlled by the ignition and a direct supply. These lines are protected by fuses F37 and F53 of the junction unit under the dashboard B002, respectively. Pins 8 and 9 of connector E of the body computer are earthed.

Parts & tools for this job For 2002 Lancia Thesis

Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.