This happens whenever I connect a battery - Ford 6.7…

[Rich W.]

And yes the batteries are going dead in a day or so. No idea why or when this happened - it was fine when I left on my last month long trip in the coach, and dead when I got home. I figure maybe the
Glonkerator Valve is actuating with the key off, but I’m hoping someone with a little more aptitude than me can narrow it down a bit more.