this 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. Quick and easy plug-in installation - no cutting or splicing necessary; simply plug it into the existing vehicle connectors, insert the included relays and fuses and you are ready to start towing. .