Well at least we are making progress. The cct board inside the BCC should be labelled FW221 for the latest version I think.....matches the schematic linked on another posting recently.
In case you were not aware, there was a recall on the BCC for some coaches (not certain if Daybreak was part of that recall - check with Thor or on line?) because if the latching relay for the chassis battery failed it would disconnect the chassis battery at any time the failure occurred.....while driving/ at night/ etc. So they basically hard wired the chassis battery......moved the ignition/alternator cable feed from chassis switched post to the chassis battery post on the BCC. I would focus on getting your coach batteries recharged ASAP first though......shore power charge them up fully (12.6 volts assuming wet cell batteries) before you do any more trouble shooting. You don't want to damage them or freeze them.
__________________
|