I've been watching a few South Main videos where he replaces the suspected bad part with a homemade test light to verify it's getting enough current, as a voltmeter or electronic test light wouldn't put any load on it and produce a false conclusion. Go to 8:45:
What bulb can you use for those tests? Any tool company sell them in a test kit?
What bulb can you use for those tests? Any tool company sell them in a test kit?