It is referred to as such as the system needs a mere four wires for the trailer tail lights turn signals and brake lights to illuminate. The 4 way system is designed so the right brake light wire and right turn signal are green.

Led Trailer Light Kit Under Over 80 Waterproof 2 Tail
Trailer tail light wiring harness. 50 out of 5 stars 20. This vehicle to trailer wiring harness creates a standard trailer wiring connection by plugging into vehicle harness and tail light assembly and then routing the 4 way harness to the rear end of a vehicle. Juneven 6ft 4 wire 4 flat trailer light wiring harness kit 4 way trailer wire extension wishbone style with 18 gauge white ground wire sae j1128 rated. 8 116 long x. Trailers over 80 wide tail light dimensions. Though trailer lighting systems are available in an array of configurations the most popular is the 4 way system.
This vehicle to trailer wiring harness creates a standard trailer wiring connection by plugging into vehicle harness and tail light assembly and then routing the 4 way harness to the rear end of a vehicle. Juneven 6ft 4 wire 4 flat trailer light wiring harness kit 4 way trailer wire extension wishbone style with 18 gauge white ground wire sae j1128 rated 50 out of 5 stars 21 1299 12. Get it as soon as tue jul 21. Free shipping on your first order shipped by amazon. 2 tail lights 2 amber clearance lights 2 amber reflectors license plate bracket 25 wiring. This incandescent trailer light kit comes with everything needed to properly light your trailer.
If you own an older vehicle chances are it will have neither trailer package factory installed nor t connectors available for it. To trailer or attach with adhesive backing 25 wiring harness with 4 pole connector dot approved pc rated specs. If you own an older vehicle chances are it will have neither trailer package factory installed nor t connectors available for it.
Gallery of Trailer Tail Light Wiring Harness

