Part of the backlighting in my dual climate control has gone out, and I can't get any help or find any answers on what might be causing it. I just had some speaker wiring done to get the factory audio working again and right after, 50% lighting went out on this thing! Went back but no help. Here...

Is there a way to make the cruise control stay on even after turning the car off and back on again? In other words, basically staying on until I turn it back off again, no matter what? I know some CC's can do this. My wife's Jag can and other vehicles can do this, but is there a mod/wiring/etc...