Amazon.com: DOAUTO 29Ft 4 Way 4-Pin Flat Trailer Wiring Harness Extension Kit with Dual White Ground Wire, 25' Male & 4' Female Wishbone 18 Gauge Connector with Full Terminal SAE J1128 with
Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think) | etrailer.com
Trailer Wiring Diagram and Installation Help - Towing 101
25Ft Male 4Ft Female Trailer Wiring Harness – Nilight