I just added A/C to my gf's CRX about 5 months ago. Worked great. Had a guy put pressure on the system to check for leaks and it had none, so I had it filled. Everything was nice until today. It just wouldn't work. I poped the hood and the clutch isn't engaging. I thought it was low on freon so I checked all the AC lines for signs of a leak.. Still, none. Then, I checked the fuses, both in car and in engine bay. Everything was fine. It must be the relay. It could be the compressor, but I doubt it. The compressor is in good shape and the clutch still moves easily, just won't engage. It must be the relay. Can I just swap the relay with another spare one I have? Exactly which relay is it? My gf has 3 or 4 relays in her engine bay.