You're wiring up a small trailer and want something quick that won't leave you guessing. This 4-pole loop is just long enough to get the job done. You match the wires, splice it in, and the lights come on like they should.
You're halfway through loading the trailer when your buddy shouts the lights aren't working. You check the plug. Wrong connector. No time to troubleshoot. You grab the harness, plug it in, and just like that, everything lights up.
The lights keep flickering. You've checked the bulbs and the plug. Nothing. Turns out it's the ground. You splice in this 4-pole loop, bolt down the dedicated ground wire, and the lights come on like they should. Problem solved.
You're replacing the wiring on a trailer with surge brakes and want everything to work right the first time. This 5-wire flat set gives you the reverse lockout and all the lighting functions. Splice it in, match the wires, and you are good to go.
You're sorting out a trailer light issue and don't want to rip everything apart. This loop lets you test wiring fast. Plug it in, check the LEDs, and see what's working. Saves time and frustration.