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This started about two months ago. I went into my master bathroom, turned on the lights, and they immediately went off. Tried the switch a couple of times, nothing. The hall bathroom is on the same circuit along with a wall outlet in the master bedroom and the hall light. I tried all of them, nothing. The hall bathroom has a GFCI. I poked the test and reset switches, nothing. I checked the circuit breaker, switched it off, back on, nothing. Replaced the circuit breaker (easy, cheap), still nothing. I was working on other projects so I put up a couple of motion detector lights in the bathrooms. No biggie. I'm single, nobody to complain.

A couple of weeks later, on a routine visit to the bathroom, I forget myself and flip the light switch out of habit. The lights went on. Checked the other bathroom, lights went on. Checked the hall light and bedroom outlet, everything works.

Scratch my head. OK, once less thing I have to do.

A few weeks go by. I go to the bathroom flip the light switch and the lights go right off. Made the rounds, poked the GFCI, nothing, circuit's dead. OK, I'll get to it one of these days. Still no biggie using the motion detector lights.

Today, a little while ago, I used the hall bathroom, with the motion detector lights. I walked out of the bathroom and my brain says, "Whoa, back up, the little lights in the wall switches are on." Flipped the switch and the lights go on, as does everything else in the circuit.

Ideas, please.
 
When simple testing finds plenty of HOTs ,
(May be other polarity -floating hot )
.. requires thinking on your head ! ...
 

Lucien Nunes

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Mentor
Arms
Esteemed
Sounds like an ordinary bad connection, somewhere near the beginning of the circuit. A loose wirenut, a cable not quite under the head of the screw, or something like that.

Easy to find using continuity tests with an ohmmeter when it is not working, harder when it is, but a systematic search, based on the order the circuit passes through the various switches and outlets, will probably find it in the one nearest the panel.
 

Megawatt

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Arms
Sounds like an ordinary bad connection, somewhere near the beginning of the circuit. A loose wirenut, a cable not quite under the head of the screw, or something like that.

Easy to find using continuity tests with an ohmmeter when it is not working, harder when it is, but a systematic search, based on the order the circuit passes through the various switches and outlets, will probably find it in the one nearest the panel.
I have to agree with @Lucien that somewhere in you circuit has to have a loose connection and as Lucien stated it’s probably a wire nut that’s not making a good connection. Good luck
 
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