Making the connections should cause the led to light up.
Easiest way to test christmas lights.
Begin at one end of the darkened string of christmas lights and carefully remove the first bulb.
Test the bulbs start at the plug end.
Step 2 locate the two wires on the bottom of the bulb and touch a probe to each wire ensuring that the probes do not touch each other or more than one wire.
Make sure that the cathode and anode are not touching each other during this test which may prevent the current from.
When they don t work 2.
Examine the plastic closely on the side of this box and in between the prongs for a cover you can slide or pry open.
Light testers search for the point in the string where the voltage changes between a good bulb with current flowing and a problem area with minimal current.
The black and red probes should also not be touching each other during the test.
A string of christmas lights typically has one or two tiny fuses in the plastic box attached to the prongs.
Usually changing a problem bulb or tightening it will fix the entire strand.
Second test the christmas light bulbs with an inexpensive tester available where holiday lights are sold and online.
Unpack your bulbs and plug them in to test they work before you put them on the tree.
Some christmas light testers work by having you slide each christmas light bulb through a hole.
Testing the connections and wiring in fairy lights 1.
Open the fuse case.
Looks like it will make hanging outdoor lights on the house really easy.
It s a strip of trim you affix to your house.
These often get stuck so you may need to use some force.
How to find a bad bulb in christmas lights.
Press down the black button hold the tip about 1 2 in.
Check the fuse and wiring in the plug.
Then you attach the lights on a slide piece with clips.
There s a way to test and fix the entire string of miniature lights without testing each bulb individually.