The Green light should be at the bottom this means empty on the holding tanks (Gray & Black) Red means full on holding tanks.
The Red on the Fresh Water tank means your out of water Green you have a full tank or 2/3 full.
The propane works in the same mode as the fresh Water does.
The Battery also works the same as the propane & water tank.
This is the way it works on the 05 Sun Voyager yours should be the same if not exact the colors should be the same, Yellow is about the Half way point.
Hope this helps you!!
Earl
__________________
2005 sunvoyger, # 8368 , 2001 Jeep toad, 1-Wife, 1-Dog Tori the Maltese. FMCA 64574 Good Sam life member