Lexus GS II facelift (2000-2004) Back-up lamps circuit

DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) GAUGE FUSE HOT IN RUN OR START JUNCTION CONNECTOR J/C 1 (IN ECU BOX) JUNCTION CONNECTOR J/C 17 (UPPER RIGHT SIDE OF DASH) JUNCTION CONNECTOR J/C 19 (ABOVE LEFT REAR WHEELWELL) JUNCTION CONNECTOR J/C 20 (ABOVE LEFT REAR WHEELWELL) JUNCTION CONNECTOR J/C 27 (BEHIND LEFT KICK PANEL) JUNCTION CONNECTOR J/C 3, 4 (IN ECU BOX) LEFT REAR COMBINATION LIGHT (INNER) BACK- UP PARK/NEUTRAL POSITION SWITCH (ON TRANSMISSION) RED (OR GRN) WIRE RED WIRE RED/BLK WIRE RED/BLU (OR RED) WIRE RED/BLU (OR VIO/WHT) WIRE RED/BLU WIRE RIGHT REAR COMBINATION LIGHT (INNER) BACK- UP WHT/BLK WIRE