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[16ACE27]

Originally Posted by 16ACE27

You have a very high resistance connection to your appliances. When turned off, no current is drawn which allows your multimeter to read the 12 VDC available. When turned on and current is drawn the entire 12 VDC is dropped across the high resistance connection so o VDC will be read at the load terminals. Think of it like a water hose with a spray handle on the end. When the spray handle valve is shut it has full pressure to the sprayer even if there is a kink in the hose. But squeeze the trigger to allow the water to flow and the pressure diminishes to zero with almost zero flow due to the kink in the hose.

Originally Posted by Cantwell Troy

I can make the fridge work by wiring a 12v battery directly to the back of the fridge. If I hook only the positive wire up it does not run. If I hook up both the positive and negative wires from the battery the fridge runs.

The positive wire going to the fridge from wherever is hot until I turn on the fridge or furnace then I lose all power on that wire.