Horn circuit for Volvo S80 II facelift (2009-2013)

BLK WIRE BLK/VIO WIRE BLU/WHT WIRE CEM CENTRAL ELECTRONIC MODULE (CEM) (BEHIND RIGHT END OF DASH) COMPUTER DATA LINES SYSTEM CONTACT REEL (TOP OF STEERING COLUMN) ENGINE COMPARTMENT COLD ZONE (REAR OF ENGINE COMPT) FUSE GRY/BLK WIRE GRY/ORG WIRE HORN 1 (LEFT FRONT OF ENGINE COMPT) HORN 2 (LEFT FRONT OF ENGINE COMPT) HORN CONTACT (IN STEERING WHEEL) HORN RELAY HOT AT ALL TIMES NCA WIRE RED/BLK WIRE RED/BLU WIRE RED/VIO WIRE STEERING WHEEL MODULE (IN STEERING COLUMN) VIO/GRN WIRE VIO/ORG WIRE