Center Ballast doesn't work :: 2003 Supra GGE

I am trying to troubleshoot the ballast system and I am only having issues with the front center. It won't fill or empty, but the other two bags are fine. I can hear the solenoid click when I flip the switch to fill the front bag. Does anyone have some good basic troubleshooting steps? And does each bag have it's own pump to fill the bag?

Thanks