6spdcoupe

I have an '06 E55 and the only problem (so far ! ) is with the airmatic not raising or lowering - at all. The problem seems to be narrowed down to the pump itself not getting constant power.

Bench testing the pump operates fine. Fuse is good, relay is good.Just not receiving power via the 12awg constant feed. I would assume it to be a module, but we all know what assuming leads to ! Thoughts ?

I did search and nothing seemed to point in the same direction as this particular situation. Perhaps I missed something, but nothing stood out.