There s a way to test and fix the entire string of miniature lights without testing each bulb individually.
Easy way to test christmas lights.
Some christmas light testers work by having you slide each christmas light bulb through a hole.
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.
Buy one that is made to hold the type of coin cell battery e g a cr2025 you ll be testing with.
You can find these online or at some hardware or electronics stores.
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Make sure that the holder has red and black leads to test led lights.
There is a light tester available at most home improvement stores target and walmart.
Second test the christmas light bulbs with an inexpensive tester available where holiday lights are sold and online.
The multimeter will emit a low voltage through the probes that will test whether the bulb has been burned out.
Light testers search for the point in the string where the voltage changes between a good bulb with current flowing and a problem area with minimal current.
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 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.
It combines a voltage detector bulb.
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.