Volvo XC60 I (2008-2013) Trailer tow circuit, 4-pin

1 74/538 4-PIN TOW HITCH CABLE HARNESS (UNDER CENTER OF REAR BUMPER) BLK WIRE BLK/ORG WIRE BLK/WHT WIRE BLU WIRE BRAKE LIGHT CONTACT (AT TOP OF BRAKE PEDAL ASSEMBLY) BRN WIRE CEM 30 31 CENTRAL ELECTRONIC MODULE (CEM) (BEHIND RIGHT END OF DASH) COMPUTER DATA LINES SYSTEM ENGINE COMPARTMENT DISTRIBUTION BOX (LEFT SIDE OF ENGINE COMPT) FUSE G-TRM (LEFT REAR (LEFT REAR CORNER OF OF LUGGAGE LUGGAGE COMPT) COMPT) GRN WIRE GRY/ORG WIRE HOT AT ALL TIMES HOT W/ 15 FEED RELAY ENERGIZED LEFT REAR LAMP HOUSING ORG/ WIRE PASSENGER COMPARTMENT DISTRIBUTION BOX RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RIGHT END OF DASH) STOP TRAILER MODULE (TRM) (LEFT SIDE OF LUGGAGE COMPT) VIO WIRE VIO/BRN WIRE VIO/ORG WIRE VIO/WHT WIRE WHT WIRE YEL WIRE YEL/BLU WIRE