Quote:
Originally Posted by Diesel911
I am just going to throw this in. I don't like to use incandescent test lights because when the time comes to use one the bulb is often shot and it is often difficult to find good ground for it near where you are using the light. I prefer a volt meter because it tells me how many volts I am getting. I have found that to be of the most use most of the time.
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Using a volt meter on an electronic circuit board fed by a well regulated power supply will work. However , a car has a unregulated supply and long wire runs. This makes for " yep, the voltage is slightly low but is it due to a fault or normal resistance? " .