Front courtesy light G010 is connected in series to front door switches I016, I017 and I105 at pins 1 and 3. The door switches are normally closed type. When the door is opened, the switch closes to supply earth connection C015 to the courtesy light and control panel H090 at pin 12 of connector D.The control panel supplies a power supply to courtesy light G010 - pin 2 - from pin 8 connector B. This power supply reaches door switches I016 and I017 - connector B - and instrument panel E050 - pin1 connector C - via a special node. When one of the front doors is opened, the door switch earths the circuit, turning on the front courtesy light bulb and switching the positive signal on instrument panel E050 - pin 1 connector C - and control panel H090 - pin 12 connector D - to a negative signal.When the signal has been received, control panel H090 sends a positive signal to the instrument panel from pin 11 of connector D to activate the door open warning light.When the courtesy light selector is set to mode A, the bulbs are permanently connected directly to earth and thus always on. In mode C, the earth is no longer supplied and the courtesy light therefore never comes on.When sliding side door I105 is opened, the door closes pin 3, connector C of control panel E050 to earth to control activation of a warning light on the control panel. Control panel H090 receives the same signal at pin 11 of connector D and controls activation of courtesy light G011 and G012.Control panel H090 receives information that one of the double-doors is open at pin 10 of connector D and therefore controls activation of rear courtesy light G041.The power supply to the control panel comes directly from the battery and the line is protected by fuse F01, located in engine bay junction unit B001, and fuse F39, located in underfacia junction unit B002.