7 Way Trailer Wiring Colors. Industry standard wiring configurations and color codes. Determine which color wire supplies constant power to the ignition switch.
The only thing it tells you is which wire is the ground. Consider making small loops with each wire to guarantee a secure fit. I have used two feet of six of the seven color wires.
Hardwiring requires the installer to locate the proper.
This is the most common configuration.
Wiring and the quality of your wiring matters. This harness has a seven-four way connector that reduces the need for wire. The only thing it tells you is which wire is the ground.