Lexus GS III (2004-2007) Horn circuit

BLK WIRE BODY ECU 1 (IN PASSENGER SIDE J/B) COMBINATION SWITCH ENGINE ROOM R/B 2 (ON LEFT SIDE OF ENGINE COMPT, BEHIND STRUT TOWER) GRN WIRE GRN/BLK WIRE HORN HORN RELAY HORN SWITCH JUNCTION CONNECTOR 18 (BEHIND RIGHT KICK PANEL) LEFT HORN RIGHT HORN (IN FRONT OF RADIATOR)