The Tekonsha T-One T-Connector 4 Way Flat Tow Hitch Trailer Wiring Harness is the replacement for your factory electrical connector to the back of your vehicle. This tow hitch wiring harness kit is used to link the wiring from your vehicle to the trailer when towing. Tekonsha Tow Harnesses feature custom designs to fit each vehicle make and model based on manufacturer specifications. Plus, the Plug & Play connectors on the end of the wires make the wiring harness for trailers easy to install. No cutting or splicing! Tekonsha offers the largest, most complete line of replacement vehicle wiring harnesses. To install a Tekonsha T-One wiring harness, simply locate your vehicle's wiring harness connector typically behind the vehicle taillight - unplug the connection and insert the T-Connector into the vehicle's harness. It's that easy! So, what are you waiting for? Hit the road with the peace of mind only Tekonsha can provide. Life's a Journey. Stop Often.