Car Wiring Diagrams for Horn circuit for GMC Sierra 2500 (2000-2004)

BLK WIRE BLK/YEL WIRE BODY CONTROL MODULE (IN CENTER CONSOLE) DK GRN WIRE HORN FUSE HORN RELAY HORN SWITCH HOT AT ALL TIMES LEFT HORN (LEFT SIDE OF RADIATOR SUPPORT) RIGHT HORN (RIGHT SIDE OF RADIATOR SUPPORT) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPARTMENT)