Today on our 2007 Volkswagen Jetta, we'll be installing the tow-ready T One vehicle wiring harness with 4-pole connector, part number 118531. To begin our install, we'll first go ahead and open up the rear cargo door. Then we'll remove the spare tire cover and rear threshold. On this application, the rear threshold is missing some of the fasteners to secure it, so we can just go ahead and pull… see more >