I came back to find my battery drained as a result of what I believe to be a power steering pump that would not shut off.

I opened the hood and put a charger on and then heard a humm/clicking and I felt vibration at the bottom of the PS reservoir. I pulled every single fuse (both fuse panels) but the humm continued.

Anyone have an idea what's going on and what I might do?

 

Sounds like the pump went bad....
Pretty common....
Simply replace.