The relay R8 , housed in the engine compartment junction unit B01 , controls the heater fan circuit.The supply for the relay contact arrives from the battery at pin 1 of connector A and is protected by fuse F8 , whilst the energizing of the coil is controlled by the ignition (INT/A) by the line protected by fuse F31 (junction unit under the dashboard B02).The relay R8 direcly supplies the fan N85 which operates at different speeds thanks to the regulator O30 . The regulator, in effect, makes it possible to select different resistance (voltage divider) which vary the ''load'' for the circuit and make the motor N85 work at four different speeds.The control panel has ideograms lit up when the side lights are switched on by lights G45, supplied through the line protected by fuse F51 of the junction unit under the dashboard B02 .