there will be switch somewhere thats says de-ice on it
the heated windshiled was only used in certain years and was dis-continued
new they were about 800.oo and an option on my 94-eldawg
thery are not made any more. you would have to go to a salvage yard to get one.
can't fix small chips in them like regular windshileds. there is a film in them that carry the current. and in certain light conditions you could see the reflective film sandwhiched in the glass. even in the summer you could turn it on and it would block the suns rays from heating up the interior
cracks very easily, had mine on this winter (second time ever) and the wiper skipped over a piece of ice on the winshiled and....
u guessed it, cracked it in a small place, 15-minutes later the crack ran the whole length
if you have to get a new winshield, get the OEM replacement, not one from those vans that comes to your house and installs. they are from PPG (there glass is now made in china)
OEM (which comes from Canada) is thicker and has better tolerences