Hello all! I'm having a strange issue that I cannot seem to diagnose.
I have a 2006 Four Winds Chateau 31P Class C RV. I've owned it for 9 months now. I've got 3 new 12V deep cycle house batteries (all purchased 6 months ago). I have not had any issues lately regarding charging, batteries, etc. When the RV engine is on, the alternator is providing 14.1v on the house batteries. When I was plugged in to shore power, my WFCO converter (purchased 6 months ago) was charging the house batteries. When my Onan generator was on, the house batteries were getting charged and everything in the RV works (120v and 12v). Something changed over the last week.
I have a volt sensor connected to an app on the house batteries and I can see that they are fully charged (~12.9v) after a recent 5hr drive. I just put a volt meter on the house batteries and confirmed that there is ~12.9v on the batteries (engine off, not plugged in to shore power, and generator off).
Here's the issue... For some reason (when not connected to shore power) the Battery Disconnect switch is no longer working. When I am not connected to shore power and the generator is off, when I turn the Battery Disconnect switch 'On' nothing happens (...it used to work fine up to just one week ago). Now, nothing happens. And none of the 12v items in the RV (ie. lights, etc) work. I also notice that the Kwikee electric step does not move when I open/close the side door. If I turn on the generator (or plug into shore power), the Battery Disconnect switch seems to be overridden and all the 120v and 12v items in the RV work fine AND the electric step opens/closes perfectly anytime the side door is opened or closed.
I checked all the fuses in the RV house converter fuse box and they are all fine. Is there a separate fuse for the battery disconnect? I don't remember the electric step requiring the battery disconnect switch to be "on" in order for the electric step to work. How does your electric step work on your RV when the main battery disconnect is 'off'?
I also notice now that when I plug into shore power or turn on the generator, nothing changes on the house battery voltage (...Looks like they are NOT being charged). All of the 120v and 12v items on the RV work when plugged into shore power or the generator is on. The AC...the microwave...the electric side step all work when plugged into shore power or the generator is on.
Any thoughts on what I should check? Is there a fuse for the Battery Disconnect (and electric side step)? Could the fuse be under the driver side dashboard? (those seem to be more associated with the RV engine and dash and lights....).
It looks like there might be two independent problems...something wrong with the Battery Disconnect, and the converter charger doesn't seem to be working. Thoughts?
Your help is greatly appreciated!
-Chris
San Jose, CA
Own two 2015 Thor Majestic 28a Class C RVs
