Sounds very similar to what I experienced shortly after getting our '82! I installed a Source Isolation Switch for our HEART Power Inverter as a precaution (required on boats, not sure why it isn't required on RVs). I agree not so sure why they are using the Negative (-) side, I have made sure that the Battery Disconnect Switches are as close as possible to the Batteries and on the Positive (+) side.
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have Coach will Travel
Steve & Tricia
1982 Newell 38' (built before #1) 6V92 DD, 5 Speed Allison, 12.5 KW Kohler, Couch used to make into a Bed but I fixed it!
https://newellshowcase.com/thumbnails.php?album=214
2007 Yukon, 1981 CJ7 Laredo, 2002 Honda CRV, 1955 Thunderbird, 1952 Pontiac Sedan Delivery, 1952 Ford 8N, 1958 Airstream, 1959 Glasspar 16' Avalon, Cabin in the Woods........what will I work on next
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