Tekonsha replacement trailer wiring harnesses are designed for vehicles originally equipped with a factory installed tow package - perfect for replacing or upgrading damaged or missing factory harnesses. Includes vehicle specific connectors, 16 gauge bonded wire, and a 7 pole round receptacle. Designed to fit vehicles originally equipped with a 4 pole harness - will not work on vehicles factory equipped with a 7 pole harness. Quick and easy plug-in installation - no cutting or splicing necessary; simply plug it into the existing vehicle connectors, insert the included fuses and you are ready to start towing. Easy to follow Instructions included. Backed by Tekonsha. 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.