- versions with manual gearbox:The switch for the reversing lights I20 receives a supply controlled by the ignition (INT) from the fuse line F59 and relay T6. this is an ignition-operated supply controlled from pin 1 of connector A of M1.- versions with robotized gearbox - petrol engine:The switch for the reversing lights I20 receives a supply controlled by the ignition (INT) from the fuse line F24 and relay T6: this is an ignition-operated supply controlled from pin 1 of connector A of M1.On versions with a robotized gearbox - JTD engine:There is no switch on the gearbox and the signal arrives from the gearbox control unit M54, pin 4 of connector AThe Body Computer M1 - connector G - is supplied directly from the battery via a line protected by maxifuse F2 of the engine compartment control unit B1; its ignition-controlled supply (INT) is received at pin 2 of connector D; pin 10 of connector H or M1 supplies the Body Computer with a reference earth.When reverse gear is engaged, the switch closes and sends a power supply to the reversing light in tail-light F33The reverse engagement signal is acquired by the engine control unit M10 and forwarded via the CAN to the Body Computer and other affected nodes