The switch for the reversing lights I20 receives a supply controlled by the ignition (INT) from the fuse line F35 of the junction unit under the dashboard B2.When reverse gear is engaged, the switch closes and sends a power supply to the reversing light in the left rear light cluster (moving section) F35, directly via the junction unit B2 from pin 7 of connector D.The activation signal for the reversing light is also sent to the Body Computer M1 - pin 3 of connector F - and from there to the steering column switch unit H5, for the automatic engagement of the rearscreen wiper. See E3021 REAR WINDOW WASH/WIPE