Front Defogger Won't Work. A/C Compressor sounds like a firework
 

Hi guys I'm new to the forum, I picked up a 97 GS yesterday with only 54k miles on it. The car is great and I love it, but it seems to have this one problem. Whenever I turn on the A/C or the front defogger, my RPM's drop really low, almost as if the engine wants to die, then I hear this screeching that almost sounds like a firework. I just noticed this today as I went to drive somewhere, I pulled out of my driveway, turned on the defogger and heard that screeching sound, then as I proceeded to drive, the sound dragged on and I smelled this awful burning smell which is when I immediately switched off the defogger. I really hope the burning wasn't my clutch or anything drive train related, but I'm no expert in the field of Eclipses. Any and all help is greatly appreciated in helping my diagnose this issue.

You need to find out where that sound is coming from! Under the hood or under the dash!