Chrysler 300 - Wiring Diagrams - auto-manual The Chrysler 300 is a full-size sedan manufactured by the American company Chrysler. For the first time it was presented at the Motor Show in New York in 2003 as a concept car. In addition to the USA, it is also sold in Australia and Europe (under the Lancia brand - "Lancia Thema" since 2011). Chrysler 300 Trailer Wiring | etrailer Tekonsha T-One Vehicle Wiring Harness Installation - 2013 Chrysler 300. Today on our 2013 Chrysler 300, we're going to be taking a look at, and showing you how to install the Tekonsha T1 Vehicle Wiring Harness with four pole flat trailer connector, part number 118600 is what our wiring is going to look like when it's installed.