Tekonsha 118261 7-Way Tow Harness Wiring Package Replacement trailer wiring harness for vehicles originally equipped with a factory installed tow package - perfect for replacing or upgrading a damaged or missing factory harness Quick and easy plug-in installation - no cutting or splicing necessary; simply plug into the existing vehicle connectors, insert the provided relay and you are ready to start towing For use with vehicles originally equipped with a 7-way harness (prepped Class II towing package) Vehicle must be factory equipped with Class II towing package, 16 pin and 4 pin plugs, for this harness to work; vehicles with only the 16 pin plug require a Class I harness Instructions are easy to follow and include detailed photos; backed by Tekonsha's 1 Year Limited Warranty