If you already have a 4-pole flat trailer connector on your 2012 Volkswagen Routan, such as the plug-and-play Tow Ready # 118490, then to install a trailer brake controller you'll just need to add
our trailer brake controller installation kit # ETBC7.
The ETBC7 includes all the related parts you'll need to install a trailer brake controller such as the reliable and popular Tekonsha Prodigy P2 # 90885. I have linked both a video and article that cover the process of installing the ETBC7.... view full answer...