Tekonsha 'T-One', Vehicle Specific Tow Harness Connectors require no splicing of vehicle wires. Simply locate your vehicle's wiring harness connector, unplug the connection and insert the T-One Connector into the vehicle's harness. No special tools required. Included 4-wire flat connector is compatible with 5, 6, and 7 pole adapters (not included) to fit just about any trailer system. Intelligent trailer braking is the key to the success of the Tekonsha product line. From its humble origins as a manufacturer of RV stairs and steps in 1964, Tekonsha has evolved to become a trusted name in towing safety. The core product line consists of brake controllers, electrical wiring, and trailer brakes. The Tekonsha line has long been trusted by professional towers and weekend warriors for worry-free travel. Professional equestrian trainer, Stacy Westfall is sponsored by the Tekonsha line. Westfall trusts the safety of her horses to Tekonsha brake controls. Smooth, predictable stopping from all speeds has made the Tekonsha Prodigy, Primus, and Voyager trailer brake controls the best in class and the most popular brake controls on the market. No matter what you are towing, Tekonsha will help you stop it - Life is a journey, stop often.