Summarize the problem
After replacing several light switches on the same circuit (one switch at a time), one light fixture will no longer light up. The light fixture is controlled by two three-way switches. The light fixture's hot wire is getting 120v (tested with a multimeter). I've tried four different three-way switches and two different light fixtures. I checked the twisted neutral and it is secure. The rest of the light switches on the circuit work perfectly (bathroom, hallway, and front door lights).
- Upstairs light (will not light up, the remaining items work perfectly)
- Bathroom light and fan
- Hallway light, exterior light, and front door lights
Provide details and any research
There are two three-way switches at the top of the stairs. The switch on the left controls a different circuit that works perfectly. The switch on the right (referred to as Three-way switch #1) controls the light fixture that won't light up. Three-way switch #2 is at the bottom of the stairs, on the same circuit as switch #1 and the problematic light fixture.
Other switches on the circuit
When appropriate, describe what you’ve tried
- Four different three-way switches
- Two different light fixtures
- Testing the hot wires with a multimeter to confirm they're outputting 120v
- Untwisted and retwisted the neutral wires at switch #1
- Trying multiple combinations at switch #2 (black wire on black screw, travelers on brass screws; white wire on black screw, travelers on brass screws; red wire on black screw, travelers on brass screws)
I think the problem is that I have an open neutral on another light switch. Is it possible that an open neutral on one light switch could break the circuit on another light switch? Anything else I can do to get this light fixture working?
I finally fixed this, and boy do I feel dumb. I did not realize that, in addition to all the light switches, there's an outlet on this circuit. I had replaced the old dual outlet with an LED light and single outlet, and it was not working. I took the wall plate off, removed the outlet and found the problem. For some reason, I only connected one neutral to the left screw and capped off the other neutral. That was the open neutral. I connected the capped off neutral to the screw, in addition to the other neutral, and now the outlet and light fixture works!