Lexus IS II facelift (2008-2010) Horn circuit

BLK WIRE BLU WIRE COMPUTER DATA LINES SYSTEM ECU-IG LH FUSE ENGINE ROOM J/B 2 (LEFT SIDE OF ENGINE FRONT CONTROLLER COMPT) ENGINE ROOM R/B 1 (RIGHT REAR OF ENGINE COMPT) FRONT OF RADIATOR) GRN WIRE GRY WIRE HORN HORN (HIGH) HORN (LOW) HORN FUSE HORN RELAY HORN SWITCH HOT AT ALL TIMES HOT IN ON OR START LEFT COWL SIDE J/B (LEFT END OF DASH) LT GRN WIRE MPX-B FUSE POWER SOURCE CONTROL ECU (BEHIND RIGHT SIDE OF DASH) RED WIRE RIGHT COWL SIDE J/B RIGHT END OF DASH) SPIRAL CABLE (UNDER STEERING WHEEL) STEERING PAD SWITCH ASSEMBLY WHT WIRE WINDSHIELD WIPER SWITCH YEL WIRE