You can also test the bulbs without a light tester although this process will take more time.
Fix a string of christmas tree lights.
Alternatively buy a cheaper light bulb.
New christmas light fuses are available where christmas lights are sold and at some electronics stores.
Simply plug in the light strand and remove a bulb that s in or near the dark section.
We couldn t fix it by replacing the bulb right where the light string stopped working so i looked into it and found this helpful but a little too technical article.
Get a non contact voltage detector and skip down to tracing the dead bulb.
First slide back the plastic covering on the plug to check the christmas light fuse.
First find a socket that.
Untangle all your string lights and check for loose or frayed wires damaged sockets or broken bulbs.
Sometimes nonfunctioning christmas light bulbs can appear to be.
Some christmas light strings have more than one fuse in which case they ll be next to each other.
Replace the bulb you used to test the strand then remove and replace any bad bulbs.
How to fix christmas lights 1.
Use a light tester to test each bulb individually.
A faulty shunt may sound like a catastrophic failure but you can often fix it with the lightkeeper pro.
Discard any damaged string lights.
If the fuse isn t the problem there s a problem with a bulb.
Replace any blown christmas light fuses.
How to fix half a string of christmas lights that are out step 1.
Pull the trigger on the light keeper several times to bypass the bad bulb and light the whole strand leaving the bad bulb dim.
If one of your light strings isn t working at all or if only half of the lights are working unplug the string and look for a small access door on one side of the male plug.
Plug in the strand of lights and remove a bulb to connect the light keeper pro to an empty socket.
Tackle the project hands on with a homemade tool.
Yesterday we had a three wire christmas light string where the first half of the string was working but the second half of the light string wasn t working.
If you find one open it and inspect the very small fuses inside the plug.