This video covers the wiring harness installation for Tekonsha 119251 on a 2021 Tesla Model S. Learn how to install the trailer wiring on your 2021 Tesla Model S from a U-Haul installation professional. With a few tools and our step-by-step instructions you can complete the installation of Tekonsha 119251. To purchase this wiring harness and other towing accessories for your 2021 Tesla Model S, visit https://www.uhaul.com/trailer-hitches/?utm_source=youtube&utm_medium=2021_tesla_model_s_wiring&utm_campaign=hitches ABOUT U-HAUL Since 1945, U-Haul has been the No. 1 choice of do-it-yourself movers, with a network of more than 21,000 locations across all 50 states and 10 Canadian provinces. U-Haul Truck Share 24/7 now offers customers access to U-Haul trucks every hour of every day through the self-service options on their Internet connected mobile devices. U-Haul customers’ patronage has enabled the U-Haul fleet to grow to more than 150,000 trucks, 112,000 trailers and 40,000 towing devices. U-Haul offers more than 581,000 rooms and more than 51 million square feet of self-storage space at owned and managed facilities throughout North America. U-Haul is the largest installer of permanent trailer hitches in the automotive aftermarket industry and is the largest retailer of propane in the U.S. 0:00 Intro 0:20 Tool list 0:23 Remove cargo panels 4:08 Test signal wiring 5:03 Install wiring harness 7:12 Install and Route power wire 17:48 Program harness 19:07 Use example 19:37 Reinstall cargo panels 20:36 Outro