I am looking for details on which buttons and switches are supposed to be illuminated (backlit) on my 2006 Town and Country dash board, steering wheel, overhead console and center console. Apart from borrowing someone else's vehicle at night - I don'r know where to find this information! On the forum I do see that the heater control backlights are built-in to the circuit board and can be desoldered and replaced. But which other buttons are supposed to be backlit? Half of mine are not.