Thor Forums

[Oneilkeys]

Normal unless the engine is running or the coach is on shore power or generator, then the relay is closed and the batteries connected. As soon as the BIRD senses 13.1V on the chassis battery - if the engine is running or 13.1V on the coach batteries - if on shore power or generator, it opens the Trombetta and connects the chassis and coach batteries. They stay connected until the BIRD senses below 12.8 V and then it disconnects the chassis and coach batteries. When I got my 2016 Axis, the sensing wire that was supposed to be connected to the coach batteries was connected to somewhere else - I never figured out where. So the BIRD never sensed the coach batteries charging above 13.1V when on shore power or generator and never opened the Trombetta to charge the chassis battery. I fixed it by cutting the coach battery sensing wire from the BIRD and connecting it to the coach battery side of the Trombetta. Everything has worked fine since.