I wired in footwell lights that turn on when you open the doors. I provided constant power, and then used the switched ground from the map lights. The map lights have 2 grounds, one that is switched on when you open the doors and one that is constantly ground. The only down side to doing it this way is that if you turn the map lights on with the switch then the footwell lights will also turn on. I like this because I have black lights for the map lights that are not good for seeing in the dark so the footwell lights are useful for extra lights.