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Switch out for battery connected to coach. If its in, everything is isolated except the jacks and slides.
I never use this switch, when I store the trailer I have a battery disconnect to cut everything. No power anywhere.
If this switch is off, you also won't be charging the trailer battery when connected to AC power. A lot of folks find this out when the batteries are dead.
Check your converter to be sure it has a gadget called the "Charge Wizard" If it doesn't, invest the $25 in one. Simple install. It turns the converter into a smart charger, floats the battery when charged up so not to overcharge and boil it out of water.
Bill
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