I changed a light switch, and now have no voltage. What happened?

My light worked. I replaced one of the three way switches that operated it using the wiring diagram provided. The new switch did not work when I turned the power back on. I tried the old switch again, it does not work. I removed both switches and tested only the exposed wires and found that I have essentially no voltage at that site all of the sudden. Every other light/receptical on that circuit works and has full voltage, except this one. What happened and how do I get voltage back to this light?I changed a light switch, and now have no voltage. What happened?Some where you have opened the ciruit unintentionally. I would pull out the switch and check to see if either of the wires you had connected is a pigtail coming out of a Marrette. It is possible that the pigtail has come loose and not making proper contact with the line power. Also, double check all your breakers and make certain that the power has been tripped off. Good luck, you'll find something not right eventually.I changed a light switch, and now have no voltage. What happened?You wired it wrong.... trace the wires and check the diagram that came with the new switch.I changed a light switch, and now have no voltage. What happened?Try looking back at the wires. You may have wired it wrong.I changed a light switch, and now have no voltage. What happened?check for voltage at the light, sometimes it is there then goes to each switch, I am assuming you have voltage on the breaker.

also may try http://www.thecircuitdetective.com/3and4I changed a light switch, and now have no voltage. What happened?First, check the appropriate breaker. Next, note that your three-way switch works with another one, so try all four combinations of switch positions. Next, check your wiring: there are two wires that go to the other three way switch, and one that goes to either line voltage or to the light: make sure that the latter is connected to the marked screw (usually dyed black). If you are still having trouble, use a neon indicator to trace out the current paths from switch to switch and to the light.I changed a light switch, and now have no voltage. What happened?sounds like you have blown a fuse, or not wired it up correctly, how do you know there is no power at the switch, how are you testing it?I changed a light switch, and now have no voltage. What happened?I think if you turn the other three way switch to the alternate position and check for power again you will find it on one of the wires. Or perhaps the other three way is defective.



Look at the old switch terminals and see if they match the new switch. I have found that some manufacturers put the common(black) terminal in a different location on their switches.I changed a light switch, and now have no voltage. What happened?try thisI changed a light switch, and now have no voltage. What happened?Sounds like you wired the switch wrong. And wired the old switch wrong when you tried to put it back too. Touch two of the wires together in different combinations to get the light to come on. Note which two makes the light come on. Flip the other switch. Now do your touching again. One of the wires will make the lights come on both times. That is your common wire. The other two are the travelers. Turn off the power and connect the new switch using this information. Be careful doing this. Email if you need more info.

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