Engine batteries not staying charged

[fergo27]

I recently purchased a used 2005 Journey 36g. It appears the house batteries are not keeping a charge. They currently read 11.7. The batteries are 2 years old. I've had the coach for 2 weeks. The aux. switch has been turned off, as well as all other electrical units (as far as I know). The house batteries are fine, 13.5. Any suggestions?

[AFChap]

oops ...saw the other post but thought I was responding here ... anyway ...

Aux battery switch on my coach controls the house batteries only; you MAY have an additional cutoff for the chassis batteries too.

There are a number of parasitic drains on the chassis batteries ...radios pull some power even when off, smart steering wheel, engine computer, LP alarms, etc. In addition, the entry steps, leveling jacks and slide-outs are powered from the chassis batteries. I think basement storage compartment lights are on the house batteries, but not sure...

I would hope chassis batteries would last longer than two years, but it does depend on how they have been treated. My original batteries on 2003 coach mfg in 2002 died in 2005. The replacements put in at that time are still going strong. If yours get hot when being charged, or have any swollen sides, replace them all. Otherwise, the only way to tell for sure is to have them load tested at a battery place.

[FleetMan]

see other post.