Charging Probleme agan

[AL49er]

Hi there, I have a problem with my charging system in my motorhome. I took it to the dealer they replaced the alternator but that didn't work, they said that it could be in my. DUVAC do you know what that is and where IT might be on a 2004 country star made by Newmar diesel pusher Freightliner chassis. Pictures would help greatly thanks for your help AL.

[Fiverwheel]

Found this definition on the net:
"The Duvac system is used with a Battery Isolator this allows the alternator to maintain two battery banks at a set voltage.You also have to excite the alternator externally. Meaning that when the engine is not running there is no voltage present at the positive post. The ignition terminal is what tells the alternator to start charging. The DuVac terminal is what monitors the output voltage, the sense wire is located on the engine battery side of the isolator."

[2oldman]

Google might work.