There s a way to test and fix the entire string of miniature lights without testing each bulb individually.
Christmas light bad bulb finder.
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Finding bad bulbs on led christmas lights.
If you have led christmas lights with removable bulbs the troubleshooting process is similar to incandescent bulbs.
No fear here is how you can find that pesky problem and repair your christmas lights so that you too can pay your share to the electric company this holiday season.
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Otherwise the operation is the same as the neon bulb version.
How to find a bad bulb in christmas lights press down the black button hold the tip about 1 2 in.
By probing your way back and forth you can quickly get to the bad bulb.
Many led christmas lights are made without removable bulbs so the circuit won t fail if a single bulb breaks.
Step 1 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.
On one side of a dead bulb the red led will glow and on the other side the green led will glow.
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From the string and move it along the cord until it stops beeping at the defective bulb.