Instead of just “ohming” out components, get the “real” story by performing live brute-force point-to-point troubleshooting and force the failure to reveal itself. Please note that this guide is for qualified technicians familiar with the hazards of testing live mains circuits, and that employ adequate safety procedures. THIS BLOG IS INTENDED FOR APPLIANCE TECHNICIANS ONLY. ALWAYS USE APPROPRIATE SAFETY PRECAUTIONS WHEN WORKING WITH ELECTRICITY.
Brute Force 120v Diagnostic Method
When all else fails, this sequential troubleshooting essentially “forces” the failed portion of the 120v circuit to reveal itself. Such a systematic approach to finding failed components is a more definitive method than “ohming” parts out. I recommend using the LoZ function of your multimeter if you have it. Below is the point-to-point voltage drop testing methodology for diagnosing 120v appliances when your “Subject Load” is not energized:
The above guide will provide you with a ore definitive way to find the “break” in the 120v circuit.
Recommended LoZ Meter
The Klein CL800 is a great all-around meter for field techs. It is comprehensive – including just about every feature you’d want in the field, including LoZ testing for AC and DC volts. Producing and writing such articles takes much time. I do make a commission of of any sales purchased through the following link, and I do appreciate your support. CLICK HERE FOR THE KLEIN CL800
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