2006 steering wheel lights
 

i have just purchased a used 2006 mazda 3 sedan and i wanted to know if the steering wheel controls (stereo & cruise control switches) are suppose to light up when the headlights are turned on?? i had looked at one MAZDA 3 a couple years ago, and it seemed like i saw them light up, but cannot remember now. can someone let me know if they do. if mine are not lighting up, how can i repair this to make them light up??