Use a light tester to test each bulb individually.
Fix a string of christmas tree lights.
Replace any blown christmas light fuses.
Untangle all your string lights and check for loose or frayed wires damaged sockets or broken bulbs.
If you find one open it and inspect the very small fuses inside the plug.
First slide back the plastic covering on the plug to check the christmas light fuse.
Tackle the project hands on with a homemade tool.
Using your fingernail or a pencil flick each light bulb carefully while the strand is still plugged in.
First find a socket that.
Plug in the strand of lights and remove a bulb to connect the light keeper pro to an empty socket.
Some christmas light strings have more than one fuse in which case they ll be next to each other.
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.
New christmas light fuses are available where christmas lights are sold and at some electronics stores.
Discard any damaged string lights.
A faulty shunt may sound like a catastrophic failure but you can often fix it with the lightkeeper pro.
Replace all nonfunctioning bulbs.
Check the entire strand of lights for a missing damaged or abnormal looking bulb according to the christmas.
Simply plug in the light strand and remove a bulb that s in or near the dark section.
You can also test the bulbs without a light tester although this process will take more time.
If the fuse isn t the problem there s a problem with a bulb.
Get a non contact voltage detector and skip down to tracing the dead bulb.
How to fix christmas lights 1.
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.
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.
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.