The dipped headlamps activation signal is sent to pin 2 of connector I of the Body Computer M1 from the steering column switch unit H5. See E2011 DIPPED HEADLAMPS The Body Computer M1 receives a direct supply from the battery via the line protected by maxifuse B99 at pin 18 of connector F of the interface with the junction unit under the dashboard B2; the ignition-controlled supply (INT) reaches pin 9 of connector F of the interface with the junction unit B2.The Body Computer M1 controls the supply for the dipped headlamps and the lamp adjustment motors sending an earth signal to relay T1 in the junction unit under the dashboard B2 from pin 8 of interface connector F which energizes relay T1: this supplies the dipped headlamps and headlamp adjusment motors 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 control for adjusting the headlamps is located in the control panel in the middle of the dashboard, left side H90A.The reference earth reaches pin 11 of H90B from pin 36 of connector G of M1.The control signals produced by the two + and - buttons leave pins 2 and 4 of H90B for the instrument panel E50 - pins 13 and 16.The enablement signal (dipped headlamps on) reaches pin 8 of E50 whilst the command for activating the adjustment motors incorporated in the headlamps - pin 9 of F10 (left) and F11 (right) leaves pin 7 of E50.