Howdo i no if my compreesor on my airshock work for

You can disconnect the level control switch,which should be, possibly on the right rear lower control arm. Then turn the key on,and move the switch arm up or down. The compressor should come on and raises the car. You can also adjust it, but only a little. You should hear the compressor,every time you start the car. It can be running and waiting for the need to inflate the rear air struts.