Thor Forums

[javelin]

Thanks for the response. I am not familiar with the electrical details in your coach, but usually when you are connected to shore power and use/store is off, you should still have 120vac to the converter via the auto transfer switch and typically the 12vdc loads (lights fans etc) work without the use/store being “on”.

Then when you want to charge house batteries (and in some coaches chassis batteries too) you turn on the use/store switch. This connects the house batteries to the converter/fuse panel so battery charging can proceed.

So what I was trying to get at is if we disconnect the house batteries (use/store off so house batteries are disconnected) and shore power is connected (120vac) to the coach, you should get 12vdc to lights and fans. If you don’t, then somewhere between power source in the campground and the converter 12vdc output you have an open/failed circuit/device.
You said on gen all works fine......so 120vac from gen triggers the transfer switch (10 sec delay you said) to switch power off shore source and onto gen source.....and everything works. So it sounds like the shore connections in the transfer switch or a shore connection all the way back to the power source might be open somewhere. Bad/loose wire nut connection; burnt wire etc. Maybe your coach is different though.