Thor Forums

[Judge]

Originally Posted by Beau388

What you state is entirely true that the house batteries power the motor, but the motor relay is controlled by the computer powered by the chassis battery. You can trip the 100 amp circuit breaker and the panel will still show the chassis battery voltage. This is because the interlock for the parking brake powered by the chassis battery also goes to the jack's computer. The whole interlock circuit and relay board (down by the drivers left foot) is powered by the chassis battery. That board powers everything in the front cap except the power ports and the radio.

At least, that the way my coach works.

That is correct.... the Leveler Control Panel is powered on a seperate circuit so it can let you know when the house batteries don't have enough voltage to power the motor or should the 100A breaker trip.

But at the end of the day, the low voltage warning is all about an issue with the house batteries and not the chassis battery. When he starts his genny, the Converter is charging the house batteries and giving them enough of a boost to overcome the low voltage threshold.