The changing of the lights is really a good indication the converter/charger is having problem. Could be the Converter or a Battery bank in the first stages of a shorted cell... Check batteries for fluid levels right away. When the cells start shorting out they get real out and boil out fluids...
The age of your 1998 RV probably does not have a smart mode converter/charger installed... The newer converter/charger units really take good care of your batteries for you...
Roy Ken
My Posts are IMHO based on my experiences - Words in CAPS does not mean I am shouting
Roy - Carolyn
RETIRED DOAF/DON/DOD/CONTR RADIO TECH (42yrs)
K9PHT (Since 1957) 146.52M
2010 F150, 5.4,3:73 Gears,SCab
2008 Starcraft 14RT EU2000i GEN
2005 Flagstaff 8528RESS