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"A circuit may read 12volts on the Fluke 88 and seem good, but when tested with a test light which loads the circuit it will fail to light. "
I don't purport to know everything about electrical troubleshooting and I'd to learn as much as I can which is why I ask this question:
If a voltmeter (analog or digital) is connected to a "working" circuit (circuit switch is ON), in what case would a voltmeter read 12 volts (or source voltage) while the test light will not light? IMHO, as long as the circuit switch is ON and the meter is connected to the load input (e.g. light bulb hot wire), the meter will indicate source voltage up to that point, whatever that is. The test light should illuminate unless the voltage isn't high enough to light the bulb.
Put another way, if there is enough circuit resistance to prevent the test light from going ON, then this will show up as something less than 12 volts on the voltmeter. Yes?
Thanks,
Sherwood Lee
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