The relay R8, housed in the engine compartment junction unit B01, controls the heater fan circuit.The power supply at the relay arrives from the battery at pin 1 of connector A of B01, protected by fuse F8, whilst the coil is energized by an ignition-controlled power supply (INT/A) from the line protected by fuse F31 of the junction unit under the dashboard B02.The relay R8 supplies the fan N85 directly, which operates at the different speeds thanks to the regulator O30. When the fan H81 control is operated, the different resistances (voltage distributor) can be managed and they vary the "load" for the circuit and operate the motor N85 at the four different speeds.The control unit symbols are lit up with the side lights on by the lights G45 with a power supply via the line protected by fuse F51 of the junction unit under the dashboard B02. See E2010 SIDE LIGHTS / NO. PLATE LIGHTS