Sounds like maybe a bad shared ground.
You would need to check both window motors and at the compressor for power and ground. If both good, the units will be bad. More likely, you will find something missing, like no power to one. The important thing is finding out what these units share that would make them all stop working. I have never seen the rear window motors ever go bad.
Air suspension is basically air shocks used for load leveling. Normal suspension will still work fine.