LED lights failing to light

This is a multiple string LED prelit Christmas tree. Why do the lights fail to light when a light keeper pro shows voltage throughout the tree?

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Hi,

Just verifying that you have double checked the electrical connections.

Not sure if this is applicable to your particular tree but here are some instructions for a Winterberry tree that may be of some help.

''a) End Plugs - Fully insert the plug from the top pole into the end connector near the top of the lower pole. Continue down to connect the bottom if your tree has (3) lighted section.

b) Connectors – First find the 2 yellow CONNECTOR cord tags located between each section.

First align the 2 pins and flat on the connector and then fully inserting into the other connector. Fully screw on the cap to secure together. Repeat if your tree has (3) lighted sections.

NOTE: Reattach any loose bulb by fully inserting into an open lamp socket Your winter Christmas tree is now assembled!

9.To illuminate find and unhank the long lead wire from the bottom lighted section. Fully insert the plug directly into a working GFCI outlet or an outdoor rated extension cord.

10.Some Models have a dual color, 4-function control box. The functions are: Steady White, Steady Multi, White & Multi Color Change and Off.

11.Please check your tree for any loose, unlit or damaged bulbs. They must be replaced promptly in order to maintain the performance and life expectancy of your pre-lit tree.''

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Thank you for the input. I rechecked all the connections and checked for loose bulbs. Once again my light keeper pro is showing voltage to all areas of the tree. The company support group concluded the AC adaptor must be at fault but they have failed to follow up with a replacement.

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Hi,

As I don't know your 'tree' perhaps some general advice may help.

Does your AC adapter actually produce a DC voltage output or is it a lower value AC voltage output ? The output type and value should be printed on the adapter. If you have a DMM (Digital Multimeter -Voltmeter function) you can measure the output voltage of the adapter, (with it disconnected from the tree) and see if the output matches the stated output printed on the adapter.

If it is a DC output and if the lights are LEDs then perhaps it may be a polarity issue as LEDs are polarity dependent. Are the connectors one way only or can they be reversed and still be able to be plugged in?

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