I have a strand of LED christmas lights, but only half of the strand is working? Whats wrong!?

Question

I have a strand of LED christmas lights, but only half of the strand is working? Whats wrong!?

Answer 1

Many Christmas Lights are wired so that there are two series of independent light strings within a single strand.  Another words, a 100 light set is really 2 sets of 50 lights inside.  

When a light loses it's connection then you lose half of the strand.  A light can lose a connection for a number of reasons:  it's not firmly seated in the base, the bulb has burned out and the shunt is not closed, or the bulb is broken off.  

I would check for any of the above that are obvious.  If you cannot locate the problem, then try and find a light tester.  I do not know of one for led lights however http://www.ChristmasLightsEtc.com sells them for incandescent lights.

Also, many led light bulbs are not replaceable.  If this is the case then the strand is useless unless they are under warranty.

Answer 2

Since LED's have a very long life, the problem is more than likely a bad connection.  It's opened because of poor workmanship.  You can examine the string very carefully but I doubt that you could fix it even if you could find it.  They just weren't built to be repaired.

Answer 3

There's atleast one fused bulb in the row that doesnt work, pull each one out, use an electric tester to see if you get a line current and the put the bulb back. When you pull out a bulb and you get no current, the PREVIOUS bulb is fused, NOT the one you pulled out...replace it with the spare that you get in the set and you're done!