Volvo S80 II facelift (2009-2013) Trailer tow circuit, 4-pin

4-PIN TOW HITCH CABLE HARNESS (UNDER CENTER OF REAR BUMPER) BLK WIRE BLK/ORG WIRE BLU WIRE BRAKE LIGHT CONTACT (TOP OF BRAKE PEDAL ASSEMBLY) BRN WIRE CARGO COMPARTMENT DISTRIBUTION CENTRAL ELECTRONIC MODULE CENTRAL ELECTRONIC MODULE (BEHIND RIGHT END OF DASH) COMPUTER DATA LINES SYSTEM FUSE FUSE BOX FUSE BOX (LEFT SIDE OF LUGGAGE COMPARTMENT) G-TRM (LEFT REAR CORNER OF LUGGAGE COMPARTMENT) GRN WIRE GRY/ORG WIRE HOT AT ALL TIMES HOT W/ 15 FEED RELAY ENERGIZED LEFT REAR LAMP HOUSING ORG/ WIRE PASSENGER COMPARTMENT DISTRIBUTION RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE STOP TRAILER MODULE (TRM) (LEFT REAR OF LUGGAGE COMPARTMENT) VIO WIRE VIO/BRN WIRE VIO/ORG WIRE VIO/WHT WIRE WHT WIRE YEL WIRE YEL/BLU WIRE