Fuses & electrical 96 park ave

So a few weeks ago my automatic doors went out along with my lights turning on when the doors are opened and my chime doesn't go off at all (for key being inserted or for lights being left on while car is off) & now my a/c doesn't blow cold air. I'm pretty sure these are all connected and results of bad fuses, relay or circuit breaker. Seeing that all of these are cheaper than getting my a/c serviced.... please help!!! I'm in SC it's already 100 degree heat index!!!

A starting point, if this all happened at the same time, would be to get some wiring diagrams of each system, and look for common circuits, like a common fuse or ground.....for example if some of these circuits all share a common ground, I would be checking that ground for corrosion/bad connection....