TRAILER HARNESS PLUG

Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You
The minimum suggested wire size for a 7-way trailer plug is 16 gauge for the turn signals, brake lights, reverse lights, and running light wires. The suggested minimum for the you can simply tie the new wiring harness in with your trailer's existing wiring. Locate the junction box and remove the nuts from each terminal. Step 3: Make Trailer
How to Wire a 6-Way Trailer Plug (It's Easier Than You Think)
Although 6-way connectors are not as common as 4-ways and 7-ways, many trailers do use 6-way wiring harnesses. In particular, 6-way wiring harnesses are common on gooseneck and horse trailers. 6-ways provide the required running lights, turn signals, brake lights, and ground for the trailer. They also provide two additional pins, a brake controller output and a 12V hot lead.
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Tekonsha Trailer Brake Controller Harness, Compatible with Select Lexus GX460, GX470, LX470, LX570 : Toyota 4Runner, Land Cruiser, Sequoia, Tacoma, Tundra. Tekonsha 902502 Prodigy RF, Plug & Play Trailer Mounted Proportional Brake Controller for Trailers with 1