Reinstall it and see if it works.
Easy way to check christmas light bulbs.
The christmas light tester will indicate which bulbs are bad and need to be replaced.
If you re able to locate a bad bulb just unseat the bulb remove the bulb from the plastic base and replace it with a similar bulb.
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.
Begin at one end of the darkened string of christmas lights and carefully remove the first bulb.
The tester s indicator will light up when it s near a functioning bulb.
The only way i know how to do what you want is to take a bulb you know burns and replace each bulb in the string with that bulb until they all glow.
Some christmas light testers work by having you slide each christmas light bulb through a hole.
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.
Replace all nonfunctioning bulbs.
Use a light tester to test each bulb individually.
The easiest way to find faulty bulbs on incandescent christmas lights is with a christmas light tester.
How christmas lights work why when one bulb burns out they all go out and about new lights duration.
Simply bring the light tester close to each bulb.
You can also test the bulbs without a light tester although this process will take more time.
Sometimes it does but usually it doesn t.
Christmas light testers the most convenient way to test for faulty bulbs in a light string is through the use of a light tester.
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.