Tekonsha replacement trailer wiring harnesses are designed for vehicles originally equipped with a factory installed tow package - perfect for replacing damaged or missing factory harnesses. Includes vehicle specific connectors and 16 gauge bonded wire with a 4 pole flat plug and cap. To reduce the strain on your vehicle's existing electrical system, this kit includes a circuit protected, powered HD 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, 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. Included 4-wire flat connector is compatible with 5, 6 and 7 pole adapters (not included) to fit just about any trailer system. Instructions included. Backed by Tekonsha's 1 Year Limited Warranty. From it's 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.