ComputerChips
Senior Member
On my ACE 27.1 when you open the wet bay door there is a black piece of fiberglass that is screwed to the floor above that blocks the view of the side of the black water tank. I removed that fiberglass panel and cut it more to the correct size needed for its purpose and put it back, it hides the sensors and wiring under there. The grey water tank seems to be underneath the RV somewhere perhaps between the frame rails. It too would have the same sort of sensors.