3315540 - E2012 MAIN BEAM HEADLAMPS - Functional description

Functional description

The circuit for the main beam headlamps is operated by the steering column switch unit H5 , placing the switch in the main beam headlamps position or closing the 'flasher' contact. In the first case, the supply arrives from the exterior lights control H6, in the dipped beam position ( See E2011 DIPPED HEADLAMPS ) In the second case, the supply arrives directly from the line controlled by the ignition (INT/A) at pin 4, via fuse F1 of the junction unit B1 . When the lights control H6 is switched to the main beam position, the stalk unit H5 , with pin 3 - connector A, controls the supply of these lights, energising the coil of the relay R4 of B3 . The contact of the relay R4 supplies, via fuses F1 and F2 contained in B3 , the headlamps F11 (right) and F10 (left) respectively, in the 'normal' or XENON version. The fuse F2 also supplies the 'main beam headlamps on' warning light on the instrument panel E50 (pin 6 - connector C), while pin 16 of connector A supplies the earth C21 .