So on my 05 sedona, the pulley on the compressor is not turning nearly as fast as the belt turns and there is a smell of burning rubber. How do I know if it is the compressor that is bad or the clutch? I haven't checked to see if the air works. My girlfriends drives it and its cold outside so only the heat has been used. If I should start the car and turn the air on let me know. I didn't want to cause any more harm than needed.