airconditioning compresser doen't work. on 2003 Hyundai Tiburon

all the controls and fans work inside the car. I checked the freon level with a quage and is fine. The compressor doesn't click on and off.

Asked by for the 2003 Hyundai Tiburon
Check with a voltmeter if you have power to the compressor clutch with the air condition controls set to "on". If you don't the compressor relay is protected by the same fuse as the horn. Press the horn if it works that fuse is OK. Fuse 21 is also needed to be good for the relay to work. With the compressor wire off supply a power directly from the battery to the compressor do you hear it click? If not the compressor clutch is bad.