The compass may just need calibrated....."cal". Instructions are in the owners manual.
For the defrost, the connection should be on the drivers side at the edge of the rear glass. Just a small electrical plug. I believe that an upholstery shop that does tops may be able to help you if the contacts are bad. Cost.....should not be much but not sure.
Where are you in Fl.?
Panama City, Fl.
I wake up in the morning with nothing to do and by supper time, I have half of it done.
2000 Lightning, s/c, tuned, Basanni, built tranny
Sold them all.....
Previous Mustangs:4 - '66 Coupes(silver/blue/grey/red) '87 GT HO, '00/'02/'07 GT Vert(red)(grey)(black), '68 Coupe, '11 GT/CS, 08 GT Vert