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.