I recently installed an OHC into my truck, and am wondering how I can wire it to come on both with the doors opened, and by pressing the buttons for the map lights. I spliced it into my original dome light, but pressing the map light buttons will only turn them on/off when the switch for that dome light is on or if the door is ajar. I was attempting to run a line to a constant, but of course that just made the lights stay on at all times. Anybody have any ideas? I am terrible at the wiring game!