This harness is a game - changer for 2014 - 2020 Toyota Tundra owners. It's designed to let you upgrade your truck to the modern OEM look of 2018 Toyota LED headlights. You won't need to cut, splice, or modify the factory harness. If your Tundra already has OEM LED DRLs, like in the Platinum or 1794 edition, it easily adapts your wiring to power the new DRL feature. For trucks without OEM LED DRLs, just pick the optional DRL power harness and connect it to a switched power source like the fuse box. With this harness, your DRLs will always shine at full intensity. It retains 100% of stock functions, keeps the low beam on with the high beam, leaves the stock wiring unmodified, and is a plug - and - play install with no hyperflash. What's included? One Morimoto Tundra OEM LED Conversion Harness, an optional Morimoto DRL Adapter, and a 2 - year warranty. Note: You'll need to re - pin the connector for the blinker to work right due to a change in the front turn signal bulb. Just swap the purple and black wires. Part Number: H126.1

Using this harness is easy. First, if your truck has OEM LED DRLs, just connect the harness to adapt your wiring. If not, hook up the optional DRL power harness to a switched power source like the fuse box. The harness is plug - and - play, so you can quickly install it without complex modifications. But remember, because the new headlights use a different front turn signal bulb, you'll need to re - pin the connector from your truck. Swap the purple and black wires for the blinker to work properly. For maintenance, keep the harness clean and check the connections regularly. If you notice any loose connections or problems, make sure to fix them right away. This harness comes with a 2 - year warranty, so if there are any major issues, you can get it sorted out.