Horn circuit for Cadillac STS I facelift (2007-2011)

BLK WIRE DK GRN WIRE HIGH NOTE HORN HORN ASSEMBLY (LEFT FRONT CORNER OF VEHICLE) HORN FUSE HORN RELAY HORN RELAY CONTROL HORN SWITCH HOT AT ALL TIMES INSTRUMENT PANEL MODULE (IPM) (RIGHT SIDE OF DASH, BEHIND GLOVE BOX) LOW NOTE HORN NCA WIRE SIDE OF ENGINE COMPARTMENT) TAN WIRE UNDERHOOD FUSE BLOCK (RIGHT FRONT