Tail Light Converter- Converts 3-Wire Systems To 2-Wire Systems- w/Splice Input- w/4-Flat Plug Output- 10 Amp.-
Amazon.com: United Pacific 90620 Trailer Light Converter for Trailers, 5- Wire System to 4-Wire System, 18G Bonded Wire w/Flat 4-Way Female Connector - ONE Unit : Automotive
Amazon.com: True Mods 4 Pin Flat Trailer Light Wiring Harness Kit [Wishbone-Style] [SAE J1128 Rated] [25' Male & 4' Female] [18 AWG Color Coded Wires] 4 Way Flat 5 Wire Harness for
Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think) | etrailer.com