Daytime Running Lights & LED Turn Signals: Troubleshooting H4 Socket & Shared Mass

Hello forum users.

I will note in advance that I have very little knowledge in the field of electronics and electrics.

My problem concerns the lamp in which there are daytime running lights alternately with direction indicators.
The picture below shows all the lamp wiring
(bulb socket H4, pin for right and left indicator, and daytime running lights):


The mass is shared in the H4 cube socket.

The daytime running lights are connected to the position light switch.

The problem is:
The direction indicators flash normally until the power is supplied to the daytime running lights.
When I disconnect the daytime running lights pin (or there is no power to the daytime running lights circuit), the turn signals work again normally.

(I tried to post a movie but unfortunately I have too few posts to put it here)

I have in the installation interrupter for led turn signals:


Please help

Added after 30 [seconds]:

https://filmy.elektroda.pl/87_1523102218.mp4

Added after 42 [seconds]:

* video at the link above

Maybe you don't have this control option, e.g. TOYOTA has mass control.

mieszaczwcz wrote:

Maybe you don't have this control option, e.g. TOYOTA has mass control.

So are you suggesting that the chopper or anything that would control the operation of the lights is mounted on the minus side of the installation?
Would it be possible if there is only one minus in the wiring?
Unfortunately, I do not know what's inside because I would have to undress it completely and unfortunately they designed it quite obviously that it cannot be dismantled and reassembled.

I will wait for other suggestions, read about this control on the mass and then we will see.