|
I missed the fact you were asking about the chassis battery specifically. What is the voltage across the chassis battery? If it is the original Ford battery it is likely over due for replacement. There was a BCC cabling recall in 2014 which ties the chassis battery to the Ford engine ignition directly (as opposed to through the BCC)......so you should be able to start your engine without the chassis battery disconnect being turned on (assumes the recall was done on your coach and the chassis battery is charged OK).
If the chassis latching relay inside the BCC (assuming you have a BCC) has failed open then you will not be able to connect and power many devices that run off chassis battery. Also if charging is good/normal to the coach batteries when on shore power, the BCC should automatically connect the two battery strings together (coach and chassis) under certain conditions and charge them both. But as Beau advised....a shorted cell/damaged chassis battery won't take a charge properly.
Attaching a schematic of the typical RV Custom BCC cct board which will help you see how things connect inside. There are documents on line that describe operation etc too.
__________________
|
Thor Forums
