Fridge , furnace and A/C need good 12 volt power to operate.
High resistance of the poor connection , fooled the charger into thinking the battery was fully charged.
The charge function reads ; resistance to charge; to monitor battery state of charge. High resistance= fully charged.
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99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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