[Solved] Christmas Lights Issue: Partially Lit Strings, Connector Troubles, & Tension - Solutions Needed

Hello. I have 2 pairs of Christmas lights. Some are clipped into the other with a connector. The problem is that the second ones (attached to the first ones) glow whole. From the first part, only the first light and the last 5. Nothing shines between them. Tension comes to everyone. What may be the problem? I have no more ideas. I would like to add that after pulling them out of the cabinet and connecting them to the power socket, the voltage was present in both holes of the connector. Fortunately, I dealt with it and located the break at zero. Their connection looks like this: Three cables come out of the first bulb, two in the next. 3 cable from the first bulb runs to the last. Generally, 3 cables are only in the first and last bulb.

If you say you have voltage on each, turn the plug in the socket by 180 'and check now. There is a break, it's easy.

You must locate a defective bulb and replace it with a functional one.
There is no other solution.

This is a bit strange. I started painstakingly changing light bulbs yesterday. I took one out of the other chain. And I checked each of the first one in a nest. I took it out, checked it, put it back in its place. I found one burned. But the best part is that it wasn't shining but the whole other string was shining except for this one. If I pulled it out, it wouldn't glow. And now yes. After all, if one was burned, there are probably 2 options. Either if only the burned one did not shine and the rest did not shine, or none of them would shine. And here is a strange situation, the first one shines, then nothing long and the last 5 shines. Can someone explain to me how it works?

And one more thing. The farther I check the voltage from the plug, the fainter the tube shines, the strong it shines at the beginning, and the farther it gets. At the end, it barely glows and even blinks, it is related to the fact that the further the lower the voltage?

Besides, how can there be a break in the circuit since the second chain connected to the first one lights up all, i.e. the current passes through the first string to the second.

Once, when a Christmas tree bulb was burnt, none of the others was lit, today (Christmas tree) bulbs are made a little differently, the filament leads (in the center of the bulb) are wrapped with a piece of wire IN INSULATION, if the voltage on each of them is a few volts, if the filament burns for a moment on the burnt out (interruption in the filament), practically all 230V mains voltage occurs and the wire insulation breaks through and a SHORT occurs, the bulb does not light (of course) but does not cause a break in the rest of the bulbs connected in series.

There are different methods and different connection of circuits and different voltage of light bulbs, there are light bulbs that burn out, break the entire circuit, there are those that burn out make contact and, despite the fact that they do not light, conduct electricity further. The most important is whether this circuit is two or three wires, because if three, it is not surprising that the current is fed to the second set despite the failure of the first. Borrow somewhere if you can so. phaser, a tiny device that allows you to check the continuity of current flow without touch, over a distance. You fly over the cable and suddenly the phaser stops squeaking and it's all clear, finding a break with it is a few seconds. Let me put the picture found here on the electrode, which shows the most popular connection diagram.
Also remember that in circuits of 100 bulbs it is often the case that there are five independent circuits of 20 pcs, as if they were your two sets, but permanently connected.

Thanks, it was possible to fix this part, the jumper turned out to be a problem, which I had not noticed before. Instead of a light bulb, a jumper was inserted into the socket, probably so that it only conducts electricity further. Then the bulbs made jokes, and once they shone once. It turned out that if I moved the cable in one place, they began to blink. One of the bulbs was lofty and short-circuited once and once not, I put on another and after the case.

Gentlemen, there is one more thing, it is known that now it is raining, humidity and snow here and there. How to securely insulate the joints of the cables, which are connected with wago cubes. My guess is that just wrapping this connection with insulating tape is not enough. And yet it would be a great boom if the water got into phase. The insulation of the cable itself is impermeable to water because the cable lies on wet grass.

Lamps with replaceable bulbs are not particularly suitable for hanging outside.

cirrostrato wrote:

are wrapped with a piece of wire IN ISOLATION

I do not know how in other bulbs but at one time POLAMP (or another SAW - I do not remember anymore) made bulbs in which the role of insulation was played by Al oxide. Because the wires were made of aluminum.
It's such a festive digression - Merry Christmas!