I've replaced the airmatic air compressor and relay but still no power to the compressor. What should be the next step?

What is your question?

The air bags are not leaking, newly replaced. All connections seem to be in good condition. This is the second air compressor in the last 10 months, I did have an air bag that leaked and probably caused the previous compressor to go out. So, this is the 2nd install that my mechanic has done. I am 80+ miles from the nearest MB dealer so getting my vehicle there is not an option. Please help me with where to go next to find the issue.