If your asking, you don't have the proper training to fix, or be messing with the high pressure system loaded with Ozone depleating chemicals.
Take it to someone who is trained and has the special tools requiered.
It will cost you way more to buy all the tools you will need than to just pay a trained pro to fix it right the first time.
The air conditioning compressor clutch relay is located on the bottom of the air conditioner compressor. The relay switch will be labeled.
Its in the fuse block - underhood.......
The bearing lets the belt pully free wheel on the compressor input shaft that the clutch is attached to.
It is inside the under hood fuse box.
If the compressor will not come on at all, it is not because the system needs charging. Check for a blown fuse, disconnected wire at the compressor, or a defective compressor clutch.
could be your a\c clutch in the compressor.?. or maybe pressure leaks.
air conditioning compressor
The A/C compressor is clutch driven, when electricity is applied to a coil, it engages the clutch. Most likely the coil shorted out in the A/C clutch on the front of the compressor.
The clutch has a bolt or nut in the center, connecting it to the compressor. After the nut is removed, the clutch can be removed by use of a gear puller.
This happens to keep the fluid in the compressor viable. If it sits too long, it can become unusable.
AC clutch relay is inside the fuse case within the engine compartment.
Most automotive AC compressors use a cycling clutch compressor, where the clutch is engaged by pressure switches which will engage the compressor clutch when the pressure reaches a predetermined low level, and disengages it when it reaches a predetermined high pressure.