Toyota Tundra I facelift (2002-2006) Horn circuit, double cab

BLK WIRE BLK/YEL WIRE BODY ECU HR (BEHIND LEFT SIDE OF DASH) HORN COMBINATION SWITCH (HORN SWITCH) ENGINE ROOM J/B (ON LEFT SIDE OF ENGINE COMPT) HORN RELAY HOT AT ALL TIMES HORN FUSE LEFT HORN (AT LEFT FRONT OF ENGINE COMPARTMENT) RIGHT HORN WHT/RED WIRE