Hello I am the new owner of a 2010 Mazda 3 I Touring sedan with a single CD non-Bose radio. I was wondering if all of the buttons on the unit should light up (orange) when I put the headlights on at night? The center is illuminated blue with the lights off, but this gets very dim once headlights are turned on (buttons also look a very dim orange). No one from Mazda seems to be able to answer this. Also, if someone has a wiring diagram showing how this lighting is powered, I'd appreciate it. Thank you.