Watching that Video puts my bullshit detector into overload.
He talks about two nodes when there is only one cable. He proceeds to place the probes on two different points on the same cable.
If there are two actual cables in the loom, then they are looking for a voltage switching between the two.
A multimeter will show this. As it is pulsing, no accurate voltage will be measured. Unless your meter has a peak hold function.
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