Wiring – Outlets and lights don’t work but plug-in receptacle tester indicates all ok

powerreceptacleswitchwiring

I have two bedrooms and a shared bath that are on one circuit. Through some initial remodeling/updating, all of the outlets were replaced (3-prong), and all of the light switches. All is fine in bedroom 1 (outlets work, light works). Bedroom 2 nothing works, and bathroom lights don't work, BUT the GFCI in the bathroom does work. Breaker not tripped.

I checked all of the connections and all are tight (not stabbed, but wound around the screws). I purchased a plug-in receptacle tester, and every outlet shows up as wired correctly. I also tried a voltage tester (the pen that beeps and blinks red) and it shows that all are receiving voltage.

Does anyone have any ideas what the problem could be? Thanks so much for the help in troubleshooting.

Best Answer

A plug in electrical tester will show voltage and let you know you have power there, but it will not show amperage. So if you have a loose wire connection or a wire break under the insulation on one of your receptacles that feed the others, you will see voltage, but if you plug a light in or something else that will draw some amperage, the voltage drops due to the amperage draw. If you plug in your plug in voltage tester and then plug a light in to the other socket, you will see that the plug in tester shows no voltage or very little.