The fan N085 is supplied by the line protected by fuse F8 located in the engine compartment junction unit B001. The activation of N085 is managed by relay T08 located in B001, the coil for T08 receives an ignition-controlled power supply except during starting (INT/A) from the line protected by fuse F31 located in the junction unit under the dashboard B002.The adjustment of the speed takes place by means of the fan regulation resistances O030. There are four possible positions for the control knob H081 (in addition to the rest position); in each of these four positions H081 provides a reference earth for O030, but altering the position also changes the route of the current in O030. A route composed of several resistances in series equals a lesser current circulating in the fan resulting in a lower speed. Conversely, a route comprising a smaller number of resistances in series corresponds to a higher current and consequently a higher fan speed.The climate control fan control H081 receives a reference earth at pin 1.With the side lights on the Body Computer M001 supplies the lights for the heater controls G045 through a command coming from pin 18 of connector A.The Body Computer receives a power supply from the battery, via the line protected by fuse F1 located in the engine compartment junction unit B001. It also receives an ignition-controlled power supply (INT) from the ignition switch H001. The reference earth reaches pins 10 and 19 of connector A of M001.