Custom Dynamics Taillight Wiring Harness For Harley Installation of a Custom Dynamics Integrated LED Taillight with Auxiliary Turn Signals (sold separately) requires three separate connections for run/brake power, left turn power and right turn power. Features Provides turn signal power to rear taillight assembly for compatibility of any Custom Dynamics or ProBEAM integrated LED taillight For all '99 and earlier Harley-Davidson models with integrated taillight assembly Plug-and-play