The wire piercer I was using is called Phil's Probe I don't believe it comes in a kit www.aeswave.com/11-inch-Phil-s-Electrical-Piercing-Probe-p8557.html
Power Probe puts the LEDs there to simulate a load by only beeping when it's under 10ohms (or something like that) it just will burn you sometimes if you fully trust it.
LowZ multimeters drain voltage down to give more accurate data, but the really cool idea I've seen used is to set up your test light with banana wires, allowing one to tie a multimeter in parallel with a test light. You get voltage under active load, AND you get the reassuring glow of a test light as well. Test lights have sensitivity and specificity issues, too, so using both together improves diagnostic accuracy. I have one of the old LoadPro's, which was a 25 ohm resistor that did the same thing, tied in parallel to the multimeter with a switch. You press the switch and watch to see if voltage sags, indicating upstream resistance. The LoadPro experiment failed, they went out of business, I think because their product manuals weren't explicit regarding how simple the design was.
@@spelunkerd I saw Jake from @autodiagprogramming has that setup, I'm thinking about starting to do that, but I'm pretty comfortable with my test lights.
