> The water level for the  potable water tank in my 1991 Volkswagen 
> Campmobile reports the water level at the intermediate yellow light
> no matter the actual water  level (full, empty, whatever).  Do I need
> a new float/sensor, and if so,  is this item available from anywhere?

Most likely a bad sender. We sell both versions...

http://www.busdepot.com/253070568   (early style, mounts externally onto tank wall)
http://www.busdepot.com/255070812    (later float style, mounts through tank lid)

Ron Salmon
The Bus Depot, Inc.
www.busdepot.com