The MODE + and - controls are located in the control unit in the centre of the dashboard, left side H90B. The referenc earth reaches pin 1 of H90B from pin 36 of connector G of M1; analogue signals are sent to the instrument panel E50 to pins 13 and 16 of the instrument panel E50.The Body Computer M1 is connected via the CAN line to the instrument panel E50 from which it receives the "brightness adjustment" signal which is transmitted to the radio node and to the climate control system control unit in versions with an automatic climate control system.The power supply with the side lights on is supplied by the Body Computer M1 - pin 18 of connector H to the cigar lighter P50 light as well as to the radio controls P20 and to the climate control system controls G45 (on versions with a heater or manual climate control).The ignition ON (INT) supply line, protected by fuse F49 of the junction unit under the dashboard B2, provides the lighting for the hazard warning lights H20 as well as for the controls on the steering wheel D47, the control unit H90 - driver''s side, connector A and passenger side connector B and the controls for the sun roof H60.The LEDs for the control units on the doors and the four lights in the handles G65, G66, G67 and G68 are supplied from pin 32 of connector E of M1 in accordance with the logic described previously; for more details, See E3050 ELECTRIC FRONT WINDOWS