Batteys

farmingdad wrote:
Just bought a 2011 mountain air and the coach battery's and chassis battery's go dn owner night why, the light switchs stay lite with a dim blue light all times I don't no if there is away to cut them off

Assume you said go down overnight;
1)once the batterys get low unless you give them a super charge and not simply a surface charge they wont hold there charge
2) the fact the two start batterys and the 4 house batterys both lose their charge is extremely unusual
3) there must be a parasite load somewhere but how it effects house and chassis is a but strange
4) I would start by making sure both sets of batterys are charged up properly then disconnect both sets and let set for 24 hours
then meter them and if their low replace
if there still charged (12.5-12.8 volts) and the house at each over 6.2 volts or so then you have major power draw somewhere
but as said weird its effecting both battery packs though
at 7 years of age it may be you simply need new batterys both house and chassis
an expensive DPMH like a mountain air I would assume it has both a house and a chassis battery disconnect system though