I have a light fixture in my house that suddenly stopped working. I tried replacing the lightbulb and still non luck so I decided to try and see if it was the three way light switch itself using a multimeter, but I'm having trouble deciphering the results.
From what I understand, I should be able to:
- Turn off power to the circuit
- take my multimeter and put it in continuity mode
- touch the two screws that are on the same side
- when I flip the switch back and forth it should alternate between beeping and not.
- The same but beeping for the opposite positions when I touch the screw on the other side of the light switch instead of the screw below
When I perform this test, it beeps regardless of the position when I touch the screws that are on the same side and it doesn't beep at all when I touch the screw on the other side. Does this mean that my switch is broken or am I testing incorrectly? If it is broken, wouldn't the light be on all the time instead of not turning on at all?
Another interesting thing that I noticed – all of the screws on the side of the switch were loose. I went ahead and tightened them up, was that the correct thing to do? What effect could the loose screws have on the light?
Images of the switch below: