The diode will avoid the simultaneous operation of the 4 turn signals when we connect a flashing light.
The diode will be the intermediate between a flashing light and the turn signal light.
It is therefore necessary to have 2 LEDs for 2 flashers and a flashing light.
The diode will connect as follows:
Positive on the positive of the turn signal
Negative on the flashing indicator signal
Do not forget to insulate the component well.
We advise brazing to create a good assembly.