Not too long ago, my rear window defroster stopped working on my 97 Z-28. I checked the fuse and it's fine, I located it down to the switch itself. I pulled the panel apart to find out that there's a circuit card inside and maybe that is the problem. Do I need to replace the whole panel, A/C controls and all, or can I just replace the card inside?

 

Isn't there a breaker as well? or is that what you meant

 

breaker/fuse, yeah, that's what I meant...but it works because I swapped it with the one under it and there was no change. Also, it's the same breaker that the power seat is ran through, and the seat works fine.

 

Did you check for breaks in the window grid? See if you are getting power at the window.