Hopkins Towing Solution 11143124 Plug-In Simple Vehicle To Trailer Wiring Harness Incl. Short-Proof Power Converter Plug-In Simple Vehicle To Trailer Wiring Harness PROP65_9 Plug-In Simple! Wiring Kit Utilizes OEM connectors for enhanced fit and weatherproofing Includes vehicle side 4 flat Protects tow vehicle electronics from wiring shorts