You must fix the problem to a point where you have 120 volts at the input to the fixture.
Voltage meter light switch.
You also need a non contact voltage tester to check the switch and wires for power before touching them.
Touch the voltmeter to the input wires or connections.
After doing this turn on and off the light switch and when it is on the reading should be near to zero.
Why a tester may read voltage while the light switch is off.
Turn the power off to the switch confirm with the non contact voltage tester and uncap the neutral wires they can remain in a bundle.
You ll need screwdrivers usually one flat head and one phillips for removing the switch and disconnecting the switch wires.
If not you could have a bad breaker bad wiring or a bad switch.
Disconnect the two switch wires and spread the bare ends so they don t touch one another photo 1.
If you read 120 volts the light fixture is good.
Testing a light switch this is a question that comes up often and here is the answer.
Testing any type of light switch takes a few basic tools.
And for making the test you ll need either a continuity tester or a.
The tester will produce a voltage reading if the switch is good however sometimes you can get false voltage reading which i will explain below.
Tools for testing light switches.
How to troubleshoot light switches and replace it can be easy and d i y project.
Turn the power back on and identify the hot wire with the non contact tester.