hi scotty just bought a 93 Lincoln Mark VIII collapse suspension. Could hear compressor for air suspension running for what I think is its time intervol before it timed out. It did this repeatedly for several times. After I jacking it up all 4 tires off the ground, now compressor won't run at all. Is there a sensor that shuts this off? Also did not shut off the switch that is in the trunk that controls the compressor.