And for making the test you ll need either a continuity tester or a.
Voltage meter light switch.
Nevertheless when the light switch is off the reading shown should be 1 which means no continuity.
Touch the voltmeter to the input wires or connections.
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.
How to troubleshoot light switches and replace it can be easy and d i y project.
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.
If you read 120 volts the light fixture is good.
Turn the power back on and identify the hot wire with the non contact tester.
You must fix the problem to a point where you have 120 volts at the input to the fixture.
With your multimeter touch all the tester probe to any other screw terminal.
After doing this turn on and off the light switch and when it is on the reading should be near to zero.
Tools for testing light switches.
Testing any type of light switch takes a few basic tools.
You also need a non contact voltage tester to check the switch and wires for power before touching them.
Why a tester may read voltage while the light switch is off.
If not you could have a bad breaker bad wiring or a bad switch.
This video will show you how to check your light switch and how to replace a.