Both electronic systems inside the headlamps F10 (left) and F11 (right) are supplied - pin 9 - from the INT line of junction unit B2 protected by fuse F37.Pins 12 of the two control units are connected to one another by means of a special serial line, whilst the speedometer signal from the Body Computer M1 (pin 28 of connector B) reaches pin 10 of the junction unit located in headlamp F10.Pins 11 of the two headlamps are connected to the diagnostic K line See E8010 DIAGNOSTIC MULTIPLE CONNECTOR The Body Computer M1 controls the supply for the dipped headlamps sending an earth signal to relay T1 in the junction unit under the dashboard B2 from pin 8 of connector F of M1 which energizes relay T1: this supplies the dipped headlamps F10 (left) and F11 (right). Each circuit is protected by a fuse in the junction unit B2 : F13 for the left headlamp and F12 for the right.The headlamp alignment function, managed by the connection F10B, is incorporated in the headlamp F10: the two sensors (potentiometers) that measure the geometry at the front K1 and at the rear K2 are connected; on the basis of these signals, the headlamp electronics automatically adjust the light beam by means of a special motor (the motor for the left headlamp is regulated directly, whilst the one for the right headlamp is adjusted via the serial line between F10 and F11).