Tekonsha 118271 7-Way Tow Harness Wiring Package, 1 Pack 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 connector, insert the provided relays and fuses and you are ready to start towing Upgrades vehicles equipped with 4-flat factory wiring to a 7-way connector Simple, easy to follow, do-it-yourself instructions, with photos, included in every package Backed by Tekonsha's 1 Year Limited Warranty