Peugeot 206 Signal Problem

Good day everyone, my car is a 2001 206. I've been having a problem for a few months. The right turn signal works perfectly, but when I use the left turn signal, the fender, front, and rear turn signals don't light up at different times. One of the three bulbs isn't lighting up synchronously, so the circuit isn't complete, and it's like the bulb has blown. The electrical work done on the car includes the alarm, stereo, and window module. There are no American parking lights, etc. I don't know if there's a short circuit in the left turn signal line or if the bulb sockets are faulty. I've replaced all three bulbs, but the result is the same. The signal, which should light up with a "tick-tick," lights up in a strange, tick-tick-tick way, and meanwhile, some bulbs are missing. I hope I've explained it clearly. I haven't seen a similar problem on the forum; most of the answers I've seen are related to bulbs. Has anyone experienced a similar situation and can offer help? Thanks in advance to everyone. https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516" integrity="sha512-8DS7rgIrAmghBFwoOTujcf6D9rXvH8xm8JQ1Ja01h9QX8EzXldiszufYa4IFfKdLUKTTrnSFXLDkUEOTrZQ8Qg==" data-cf-beacon="{"version":"2024.11.0","token":"11ac6a036a5c4b83a3c20a30a3bc3ba2","r":1,"server_timing":{"name":{"cfCache Status":true,"cfEdge":true,"cfExtPri":true,"cfL4":true,"cfOrigin":true,"cfSpeedBrain":true},"location_startswith":null}}" crossorigin="anonymous">

I've experienced this problem before, if anyone has any information, please write. https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516" integrity="sha512-8DS7rgIrAmghBFwoOTujcf6D9rXvH8xm8JQ1Ja01h9QX8EzXldiszufYa4IFfKdLUKTTrnSFXLDkUEOTrZQ8Qg==" data-cf-beacon="{"version":"2024.11.0","token":"11ac6a036a5c4b83a3c20a30a3bc3ba2","r":1,"server_timing":{"name":{"cfCache Status":true,"cfEdge":true,"cfExtPri":true,"cfL4":true,"cfOrigin":true,"cfSpeedBrain":true},"location_startswith":null}}" crossorigin="anonymous">

https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516" integrity="sha512-8DS7rgIrAmghBFwoOTujcf6D9rXvH8xm8JQ1Ja01h9QX8EzXldiszufYa4IFfKdLUKTTrnSFXLDkUEOTrZQ8Qg==" data-cf-beacon="{"version":"2024.11.0","token":"11ac6a036a5c4b83a3c20a30a3bc3ba2","r":1,"server_timing":{"name":{"cfCacheStatus":true,"cfEdge":true,"cfExtPri":true,"cfL4":true,"cfOrigin":true,"cfSpeedBrain":true},"location_startswith":null}}" crossorigin="anonymous">In short, a point in the circuit that isn't grounding or is experiencing a delay could be the source of the problem. There might be rust, dust, etc., somewhere in the ground connections. My horn wasn't working either. The reason was that it wasn't grounding. A system that had worked flawlessly for years suddenly stopped working. Insufficient grounding is also a problem. The delay can be explained in this way. Ground cables are generally thick. The cable isn't broken, but it's very thin. It could be a wire-to-ground connection. There might be rust on the sockets, burnt pins, rust on the connector area, or dust. When working on electrical systems in Peugeot 205s, the battery is usually removed. Sometimes electronic components get damaged or go into protection mode, such as the lights not turning on when the doors are opened. Resetting sometimes works. Finding the solution is a laborious task. Good luck.