Why is only one of my 3-way switches working?

Identifying the common wires



Sometimes, a 3-way circuit doesn’t work because someone tried to replace a defective switch and did not properly connect the wires. Sometimes, one of the switches has become defective.

Why is my two way switch not working?





Reason 1: Loose Connections. One of the quite common reasons for this issue is loose connections. Typically, connections that are loose cause the wire to cease to function. For two-way light switches to turn on, they must be turned in a specific direction.

How do you tell if a 3-way switch is wired wrong?

Locate a Bad 3-Way Switch

  1. Toggle each switch until the light come on. Toggle one switch to see if it turns the light on and off. If it does, it is a good switch. Leave the light on.
  2. Toggle the other switch to see if it turns the light on and off. If it does, it is a good switch and the other is bad.


How do you troubleshoot a 3-way circuit?

How to Troubleshoot a Three-Way Switch

  1. Toggle the first switch. Turn the light on.
  2. Toggle the second switch. If you can turn the light on and off with this switch, this means that the switch is working. …
  3. Now go back to the first switch. Turn it on and off.





How do I know which wire is hot on a 3-way switch?

If the DIYer opens a switch box to find a white wire with black tape on it—the white wire is hot. This doesn’t mean replacing the switch requires a pro, because replacing a 3-way switch does not require running new wire–it’s simply a matter of disconnecting one switch and connecting the new one.

What is the common terminal on a 3-way switch?

Two of the terminals are a light color—bronze- or copper-colored—and are called travelers. The single dark-colored screw is known as the common terminal.

How do you fix a 3-way improperly wired switch?

Turn the power back on at the circuit breaker. Touch the probes to the 3 wires removed from the switch until you get a reading on the tester indicating continuity. The third wire is the common wire that feeds the light fixture and is connected to the black screw on the switch. Replace both switches and covers.

How do you fix a 3-way switch?



Quote from the video:
Quote from Youtube video: You can then test the circuit to see if you now have the switch working perfectly. If the 3-way switch still does not work right the next step is to put the number one wire.

Can you make a 3-way switch with 2 wires?

Question: Can I use a 3-way switch with just two wires? Answer: No. There must be three wires between the two switches. You CAN use the switch with only two wires, but it will act as a regular switch, not a three-way switch.

What happens if you wire 3 way switch wrong?

If you don’t correctly connect this wire, then your lights won’t work from more than one switch. Grounding the switch: You’ll also need to locate the ground wire and connect it to the switch too.

How do you know if a light switch is bad?



The first sign of trouble is when the switch begins to behave in a fashion that is abnormal in any way. For example, if there’s an audible crackle, snap, or popping sound when you flip the lever, then it’s pretty clear that your switch is defective and it’s time to replace it.

Why does my 3 way lamp switch not work?

With a 3-way bulb, if it isn’t working at all, it’s probably dead. You can test it by moving it to a working 3-way socket, but it’s very rare that both elements of a 3-way bulb will fail at the same time. But if part of it is coming on and the other part isn’t, the problem may be with the socket.

How do you fix a lamp switch that won’t turn on?

Quote from the video:
Quote from Youtube video: Into this socket on here everything else normally when you take off the shade of a lamp you see this like thing that looks kind of like that. You just pinch that together and it comes right off and.

How do I know which wire is neutral on a lamp?

You can identify the neutral side of the wire just by looking for markings on one of the wires. The most common identifier is ribbing in the rubber insulation all along one edge, but it can also be a white wire or a white stripe (photo below).

How do you rewire a 3-way lamp?



Quote from the video:
Quote from Youtube video: It's either going to be a Philips or standard slot. It's true and on the silver side this is going to be your neutral wire and then on the brass side this is your hot wire.

How do you wire a toggle switch for a lamp?

Quote from the video:
Quote from Youtube video: You can do positive like that and then you put your positive connection onto your device the negative connection onto your device and then over here is your battery okay. Or.

How does a three-way lamp switch work?

When you twist the switch on a three-way lamp, the first click illuminates a single filament. The next click deactivates the first and illuminates the second, this one with a somewhat higher wattage. The final, third click illuminates both filaments at once, giving you the brightest light.

When rewiring a lamp which wire is hot?

The silver is for the neutral wire, and brass is for the hot wire. If your cord is clear, the copper-colored wire is hot, and the silver wire is neutral. If the cord is white, brown, or black, the wire with the smooth surface is hot, and the one with ribs is neutral.

How can I tell which wire is hot without a multimeter?



Start by connecting one of the wires attached to the lamp to the ground (GND). Then connect the lamp’s second wire to the wire you need to test. If the lamp lights, then the wire is live/hot.

Can I use an extension cord to rewire a lamp?

It’s possible to use 16-gauge extension cords to rewire table and floor lamps. The cord should be flexible and without twists and pinches. If it is old, discolored, stiff or damaged in any way, throw it away.