Engineered for 18+ Jeep JL and JT models, our Headlight Auxiliary Light Adaptor functions as a trigger relay to add auxiliary lighting to your three headlight modes. Now you can add aftermarket LED lights to turn on with your Low Beam Lights, High Beam, and Halo (if equipped with Mopar LED Headlight). The easy DIY solution that involves no splicing of existing wires or modification to your OEM wire harness. Water-tight, and heat-resistant, spend less time on your electrical, and follow our easy step-by-step installation guide to get you on the trail faster!FEATURES-Specifically Engineered for Jeep JL and JT Models-Plug-and-play-Water and heat-resistant-Relay Trigger for:    -High Beams    -Low Beams    -Halo Light (if equipped with factory Mopar LED headlight, and the BCU has been programmed with this feature.)PARTS INCLUDED-Wire HarnessFITMENT-2018+ Jeep JL and JTRECOMMENDED LIGHT PAIRINGPairing this wiring harness with a pair of FLEX ERA® 4  or Gravity® Titan™ lights is the perfect auxiliary lighting combination for increased lighting on the trail. When connected via the harness to your High-Beam relay, you can quickly illuminate the path ahead of you, and see further faster than ever before. Or pair it with our FLEX ERA® Fog Light Kit to utilize the fog mode and Off-Road mode directly from your OEM light controls. Upgrading your Jeep's lighting shouldn't be a hassle, and this wiring harness means you can utilize more of your lights without the need to buy additional expensive lighting switch units.