Driver's seat STUCK

I recently bought a used Pontiac Bonneville. I dont think my AC is working. Seems like the compressor engages but no cold air. Got any ideas? Can a DIYer still add R12, freon, or whatever they call it to the system? HELP!!!!!

My son has a 94 Jeep Grand Cherokee V8 that I thought had a bad Crankshaft Position Sensor (CPS). I found the old sensor is located on top of the bell housing for a V8. I installed a new CPS sensor and the car started immediately. I ran it for 30 minutes and I turned it off. Restarted fine once. Now new problem. When I put it in reverse, the car backed up and when I put it in drive the car instantly died - again no spark. Check engine code only shows battery disconnected recently. My son had almost the same thing happen before it quit last time. He put it in reverse and the car stalled and it wouldn't start. Now new CPS and same problem again. Is it possible that putting the car in reverse can have anything to do with the problem? The new CPS was for a Dodge 318 that cross references to work on a 94 Grand Cherokee V8. The plug connection was different, but the sensor body looked identical; so I switched the plug and soldered the wires. As stated above the car started fine with the new sensor, so I don't think switching the plug on the sensor is the problem. The car engine had a complete rebuild about a year ago and ran great. The car first stopped after a fender bender and my son had it towed to his home. When I worked on trying to get it started, I found it had spark and power to the coil for only one second. After one second, the autoshutdown relay clicked off and there was no spark or power to the coil. I put a jumper wire to power the coil positive wire to get the car started to get it to my home. I took off the jumper wire at home and it started right up and ran OK for 2 weeks before the same problem started again when putting the car in reverse it stalled. This time I towed it to a garage but they didn't want to work on it after I told them I had put power to the coil to get it home, but they thought it was likely the Crankshaft Position Sensor (CPS). I read a number of similar posts and it sounded likely so I got a new sensor and installed it. In response to my first post, one suggestion was to replace the camshaft sensor. Not sure what to try next. Is there a coil energizing relay?