Jangling sound, hmm... Like a "heavier" version of rattling your keys.
Does the AC function properly? No. No cool coming from the vents.
Does the compressor or clutch make noise while the AC is running? Yes, it squeaks and rattles(?)
Is there any noise coming from the compressor or clutch when the AC is not running? Squeaks
Have you observed the clutch operation while someone else turns your AC on/off? No
Exactly when does this "jangling" sound happen...and what does it sound like? when the ac is turned off. Sounds like I'm shaking my keys inside a large cup.