The vehicle brake lights are located at the rear in the side light clusters and in the special centre third brake light.

The side brake lights are located in the rear side light clusters and have LED circuits controlled by dedicated internal electronics.

The centre light comprises an LED and has a light beam coming out of the rearscreen serigraphy.

The brake lights are operated each time the brake pedal is pressed via the special switch on the pedal.

The switch fitted on the pedal unit consists of two contacts which supply two signals: the first is the N.A. type, which recognizes the position of the brake pedal if it is not in the rest position, i.e. the pedal is pressed; the second is the N.C. type, which recognizes the position of the brake pedal in the rest position. The lights are turned on by the N.A. contact (pedal pressed).

The control function is activated by the enablement signals (key ON) and the command from the switch contact.

The brake lights check function monitors that the side lights are working correctly: the following are checked:

- open circuit (bulb missing or wiring interrupted)

- short circuit to earth (bulb s.c. or wiring s.c. to earth)

- short circuit to battery voltage (wiring short circuited to Vbatt)

The continuity of the fuse protecting the switch on the brake pedal is also checked.

When one of the situations described above is verified, the Body Computer makes the failure status available to the CAN: a special lights failure warning light comes on in the instrument panel and, at the same time, the information is shown in the display by means of the specific symbol.

Switch I030 receives an ignition-controlled supply from the line for pin 7 of connector C of the Body Computer M001 via the line for fuse F37 of the Body Computer M001: when the brake pedal is pressed, the switch closes and sends an N.A. signal to Body Computer M001, pin 27 of connector B of M001.

The Body Computer M001 consequently controls the power supply for the brake lights in the lamps F030 (left) and F031 (right) from pins 10 and 8 of connector F.

The middle brake light F040, on the other hand, is controlled directly by switch I030.

The Body Computer M001 - connector A - receives a direct powr supply from the battery through the line protected by maxi fuse F01 of the engine compartment junction unit B001.

The Body Computer M001 receives an ignition-controlled power supply (INT) at pin 11 of connector E.

Pin 9 of connector E of M001 provides the Body Computer with a reference earth.

Body Computer M001 is connected via the CAN line to the instrument panel E050 to manage the lights failure warning light and the brake lights check signal if problems are detected in the circuit or in the fuse.