How To Test A Wall Light Switch

This video will show you how to check your light switch and how to replace a.

How to test a wall light switch.

Touch the probes to the copper terminals on the side of the switch. You should shut the power off before you remove the cover plate on the light switch. Disconnect and remove the switch. This type of tester has two lead wires that uses the battery voltage of the tester to test a circuit which in this example is the circuit components of a switch.

These are the screws that attach your switch to the wiring in the wall. Testing a switch with a continuity tester. How to troubleshoot light switches and replace it can be easy and d i y project. 2 hold the tester within inch of the screw terminals.

A continuity tester can be used to test the light switch while the circuit is off or the switch has been removed. With the power off remove the two screws that hold the cover plate on. According to the university of washington you should see a reading of less than 25 ohms. Testing your switch with a continuity tester 1 locate the terminal screws on the light switch.

After that loosen the screws that hold the switch into the electrical box. Shut off the power to the light switch circuit by switching off the appropriate breaker in your home s service panel breaker. You will need to take them completely out of the box to free up the switch. Turn the switch on.

Identify the switch type. Remove the switch cover plate by unscrewing its two small screws to test whether it is safe to proceed to replace or rewire a wall switch.