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Led christmas light string tester.
In most cases either lights 1 15 will light or lights 16 through 30 will light.
Let s say lights 1 15 light up.
There s a way to test and fix the entire string of miniature lights without testing each bulb individually.
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Check online or at your local hardware store for mid to high.
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Now you know that your naughty led is hiding among lights 16 30.
It s different from just plugging in a string of lights in a wall socket because a defective light bulb can affect others.
Go to the 15th light and squeeze the tester on the wire to that light.
To test led lights you will need a multimeter with a diode setting.
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We keep small string on porch even after christmas as it s cheery in winter.
Didn t realize my multimeter had a diode tester.
You test the entire string at once and you ll find which ones are defective or not.
That s simple it doesn t test individual light bulbs on your strings of christmas lights.
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Time to test again.
It was bulb 12 out of a string of 25.