Not sure about the Tourmaster, but in my 2003 gasser there is a battery isolator relay circuit which will charge BOTH house and chassis batteries under certain conditions from shore power or alternator. For example, when plugged into shore power, if the chassis battery is low (below 12.3 volts, I think) the relay picks and charges it. Vice versa with the alternator. If the house batteries are low, the alternator will charge them also.
Don't know if you have a battery isolator in your Tourmaster, but it works great in my 2003.
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2003 Gulf Stream Ultra Supreme 33' 8328
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