Quote:
Originally Posted by mole
However, when the fuse is removed, the output is STILL 12 volts.
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Repeat that measurement with a load on the output terminal (any 12 volt load, like an automotive light bulb or small motor, or perhaps a 1k Ohm resistor). You will see the voltage is (nearly) zero with any load.
The proper measurement is from the output terminal to the panel's negative terminal.