The trigger wire is used when installing a european headlight switch. The wire installs between the switch and the Central Electric Control Module to run the fog lights independently. The trigger wire can also be used to wire in a rear fog light. Fits these vehicles: Volkswagen Jetta MK6 Sedan (2011-2014) 2.0T Gen3 GLI (2013.5-2014); Volkswagen Jetta MK6 Sedan (2011-2014) 2.0T GLI (2012-2013); Volkswagen Jetta MK6 Sportwagen (2010-2014) 2.0 TSI; Volkswagen Jetta MK6 Sportwagen (2010-2014) 2.5L; Volkswagen Jetta MK6 Sportwagen (2010-2014) TDI; Volkswagen Golf/GTI/Rabbit MK6 (10-2014) 2.0T; Volkswagen Golf/GTI/Rabbit MK6 (10-2014) 2.5L; Volkswagen Golf/GTI/Rabbit MK6 (10-2014) TDI; Volkswagen .:R Models MK6 R (2012-2013) 2.0T FSI;