New rear air compressor not working

[Cthomas]

I have a 2007 delanli that I replaced with a new rear air compressor. It isn't turning on. I checked all the fuses and relay and all seem fine. I am at a loose. It has power to the compressor and I also made sure the new compressor works. It's doesn't seem to be getting signal to turn on , not sure where to go from here.