Switch I67 that controls lumbar adjustment motor N38 is supplied by a line protected by fuse F57 and relay T30 of boot control unit B45; this supply, ignition-operated except during start-up (INT/A), is controlled from pin 4 of connector A of M1.Body Computer M1 - connector G - is supplied directly by the battery via a line protected by maxifuse F2 of engine compartment control unit B1; it is supplied with an ignition-operated supply (INT) at pin 32 of connector D; pin 10 of connector H of M1 supplies the Body Computer with a reference earth.Switch I67 is also lit by means of an ignition-operated supply from the line protectedby fuse F57.