I want to add some light under the seats but i dont know which wires to use that give it power to light up. i know any power wire will light it up but i only want it to light when my headlight are on.
anyone install it before ???? help !

 

Interesting mod. Wouldn't do it myself but I can appreciate the cool factor. Hope you get the answers you need and post some pics/video when you are done!

 

I had this mod in one of my older cars. I ran a wire from the lights under the seats I installed to under the dash where I tapped into the accessory lighting. Good luck, hopefully you'll find your headlight wire easily!!