K-

The AC has never worked on my car since I purchased it. Testing the 12v. Lead to the compressor I get nothing. If I give the wire 12v my compressor and fans kick on and my air is almost immediately much colder. What do I check next? The low pressure switch? Is that the one on the condenser? If I short the switch and the compressor and fans come on I just have low refrigerant right? It looks as though the system is still r12 so I imagine it would be a large expense swapping to R134? I read somewhere that r12 is now illegal in most states. Why is this?