I had a dead chassis battery on our 2016 VEGAS, emergency start did nothing...
Found a 100 AMP breaker under the "hood" was thrown. Reset the breaker and used an external charger to charge the battery.
As soon as the battery was charged, everything was good. I made sure I now carry long enough jumper cables to reach from the coach batteries to the chassis batteries "just in case".
I did not try the emergency start after I reset the breaker, but that could have been my problem. I also found that the chassis battery DOES charge from shore power as long as I don't try and start the engine while connected to shore power. If I turn the engine off, THEN connect to shore power, the chassis battery DOES charge from shore power. I figure there might be a relay miswired somewhere, but haven't tried to trace it down. When I questions THOR on this, I was told that shore power does not charge the chassis (which I know is incorrect, but not worth arguing about)
Like I said there is a 100 AMP breaker (mine was yellow) and when the "flag" is thrown, it needs to be reset. I think there is also one in the coach battery compartment
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