Oh similar to the euro mod (I saw ECU and was thinking PCM/BCM)...I have not run across any schematics that show how to do the conversion. I thought the outer ring light bar would require new LEDs to give the dim and bright mode illumination? Although if the signal is PWM then the driver circuit would require modification. :dunno:
Only way to know for sure is to measure voltage output with an o-scope. The Poland company makes it sound like the LEDs are not changed but the signal is altered. I have not messed with the tail lights (only head lights).