Light circuit lost voltage
#1
Light circuit lost voltage
I have a motion detector light at the back of my house. It has not worked in years. At one time I remember it coming on but not anymore. I can not find a switch in the house for it and so I assume it is direct wired. I want to install a new light now. I removed the old light and checked the voltage. It reads 1.5 volts. WTH?!?!
Any idea whats going on here? All the other things on the same circuit work fine.
Any idea whats going on here? All the other things on the same circuit work fine.
#2
Just do double check do you have any mystery switches which you don't know what they do? Does the light have just a single 2-conductor cable. Did you measure both hot to ground and hot to neutral? Is this light on a wall with the inside finished or an unfinished attic gable?
#3
There is a ground wire coming out of the wall which is attached to the crossbar that the light screws to. The other 2 wires coming out of the wall were attached to the fixture, and they are black and white. These measure 1.5 volts.
We do have a mystery switch but it has no effect. I will check voltage again tomorrow with this switch in the other direction. Either way, 1.5 volts with a switch on or off is a defect, isn't it?
We do have a mystery switch but it has no effect. I will check voltage again tomorrow with this switch in the other direction. Either way, 1.5 volts with a switch on or off is a defect, isn't it?
#4
Probably a defect in your meter or the way you're using it. What you're seeing is likely a phantom voltage reading. If you measure the voltage with a load in parallel it will read zero. An analog meter or neon bulb tester makes this more obvious than a consumer-grade digital meter.
#6
As I said, black to white measures 1.5 v. I just went out to check measurements to ground. White to ground measures 155v and black to ground measures 1.5v. This is really rediculous because it should be a 110v circuit.
As far as I can tell, all other items on this circuit are working fine.
As far as I can tell, all other items on this circuit are working fine.