The conversion to LED turn signals is generally quite simple. However, the electrical load of LED turn signals is different from conventional turn signals, and the frequency of flashing is outside the permissible range. Normally, you can resort to a special LED turn signal relay. However, this is not possible for all vehicles, because the flasher relay may be integrated in other components such as control parts or controllers.
Therefore, there is this electrical ballast resistor. Simply clamped between flasher cable and flasher connection in the wiring harness, the flasher relay can do its normal job again and the flashing frequency is back in the normal range.
Attention: The ballast resistor must be connected upstream of each individual flasher. So 4 pieces are needed per vehicle.AI-translation
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