Locate the two wires on the bottom of the bulb and touch a probe to each wire ensuring that the probes do not touch each other or more than one wire.
Easy way to test christmas lights.
There is a light tester available at most home improvement stores target and walmart.
Press down the black button hold the tip about 1 2 in.
The most convenient way to test for faulty bulbs in a light string is through the use of a light tester.
It combines a voltage detector bulb.
From the string and move it along the cord until it stops beeping at the defective bulb.
Buy one that is made to hold the type of coin cell battery e g a cr2025 you ll be testing with.
Easy way how to fix christmas lights finding bad bulb locating lamp repairing fixing christmas tree string of lights that are not working how to locate what light bulb is bad how to find what bulb is blown just get ideal volt tester detector probe sensor fixing string of christmas lights ideal volt sensor.
You can find these online or at some hardware or electronics stores.
The multimeter will emit a low voltage through the probes that will test whether the bulb has been burned out.
The best option is to use either an electrician s multimeter or a tool specifically designed for repairing christmas lights such as the lightkeeper pro.
Make sure that the holder has red and black leads to test led lights.
It looks like a gun and can detect if there s a break in the wire a blown shunt in a bulb a bad fuse or a.
The christmas light tester will indicate which bulbs are bad and need to be replaced.
Second test the christmas light bulbs with an inexpensive tester available where holiday lights are sold and online.
Usually changing a problem bulb or tightening it will fix the entire strand.
Some christmas light testers work by having you slide each christmas light bulb through a hole.