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Question:

How to test if electrical wiring is bad, switch is bad, or light fixture is bad?

I have a 4-bulb light fixture in the bathroom that stopped working today. The other set of lights and fan still work. Things I have tried so far:1. I tried replacing the bulbs and it still does not work.2. I have reset the GFCI switch.3. I have reset the bathroom circuit breaker as well.I opened up the light switch (the panel has two switches for two sets of lights) and can't tell if anything is wrong. I also looked at the light fixture (it's open from above) and noticed that it has two wires going in from the wall, a brown and black wire. I also wanted to test that line if possible. If the line is working, then I guess the light fixture is bad. But how do I test the line?

Answer:

The best way to test is with a meter. Lacking that you can take the wires off the switch and short them together to see if the light turns on (this is what the switch does when you turn it on. There is probably a bare ground wire attached to the switch, don't short it to either of the other two wires on the switch. You can buy a meter at hardware stores for very little money to test the lines though and I would suggest that.

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