Ford Repair: defroster, traction control, fog light problem, fog light switch, stereo wiring harness

Question
is the stereo wiring harness for a 2003 mustang gt control the defroster, traction control, and foglight switches? problem is we has a so called expert install new head unit with mach 1000 system. now, those buttons dont work. i think they put in wrong stereo to factory wiring kit. please help!!

Answer
couple questions, sounds weird but- is the head unit you had installed come with new defroster, trac control and fog light switch ??? don't know if you've seen other ford products but, the head unit ( radio's ) look light a foot ball.. if not and you had just the radio display replaced, my guess is he left them unplugged.