On one side of a dead bulb the red led will glow and on the other side the green led will glow.
Christmas light bad bulb finder.
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Many led christmas lights are made without removable bulbs so the circuit won t fail if a single bulb breaks.
If you have led christmas lights with removable bulbs the troubleshooting process is similar to incandescent bulbs.
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How to find a bad bulb in christmas lights press down the black button hold the tip about 1 2 in.
Otherwise the operation is the same as the neon bulb version.
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Finding bad bulbs on led christmas lights.
By probing your way back and forth you can quickly get to the bad bulb.
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.
From the string and move it along the cord until it stops beeping at the defective bulb.
You use the probe to search for the open bulb in the string.