Tekonsha 'T-One', Vehicle Specific Tow Harness Connectors require no splicing of vehicle wires. Simply locate your vehicles wiring harness connector, unplug the connection and insert the T-One Connector into the vehicle's harness. No special tools required. To reduce the strain on your vehicle's existing electrical system, this kit includes an upgraded, circuit protected powered ModuLite module that takes power directly from the battery to power the trailer's lighting system. Depending on the vehicle, the module either receives its power from a single, simple to add, the wire that connects to the positive battery terminal, or draws power from the vehicle's trailer wiring port. The ModuLite module also ensures that the tow vehicle's electrical system is compatible with the trailer's wiring, as well as safeguarding the tow vehicle's electrical system from harmful short circuits and overload situations. The included 4-wire flat connector is compatible with 5, 6, and 7 pole adapters (not included) to fit just about any trailer system. 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.