Charging system road rage

Some discussions on moparts about what it takes to meaure shunts.
https://board.moparts.org/ubbthread...e-or-a-known-resistance-wire.html#Post2284931
https://board.moparts.org/ubbthread...-up-an-aftermarket-amp-gauge.html#Post2519459

My takeaway is there is not enough current in the typical multimeter to reveal resistance in a shunt.