Tekonsha 2 to 3 Taillight Converter

The Tekonsha 2 to 3 Taillight Converter is a critical electrical adapter for vehicle towing applications where wiring incompatibility between tow vehicle and trailer presents a common installation challenge. This converter bridges the gap between older or simpler towing vehicles equipped with 2-wire electrical systems and modern trailers or towed vehicles requiring 3-wire configurations. Whether you're connecting an RV with legacy 2-wire lighting to a newer enclosed cargo trailer or flat-bed with full 3-wire brake and turn signal integration, this Tekonsha converter eliminates the need for expensive rewiring or custom harness fabrication.

This adapter works by translating the signal protocol and voltage distribution from a 2-wire system—typically ground, tail/brake light, and turn signals multiplexed on shared conductors—into the three discrete circuits of a 3-wire harness: ground, tail lights, and brake/turn signal isolation. The compact 3 x 3 x 7 inch module (weighing just 0.45 lbs) houses the necessary relay logic and wiring connections in a sealed housing, protecting against moisture and road debris. Installation is straightforward: connect the 2-wire source from your tow vehicle to the input terminals, then plug the standard 3-wire connector into your trailer's receptacle. The Tekonsha design ensures proper load distribution and prevents false brake signal activation caused by ground loops or signal bleed-through.

Mechanics and RV owners benefit most from this converter when retrofitting older tow vehicles or mixing generational equipment that was never originally designed to work together. Compatibility extends across most domestic and import RVs, travel trailers, and flatbed equipment manufactured since the 1990s. Installation requires no cutting or splicing if your vehicle uses a standard towing harness connector—simply plug and secure the converter between your existing 2-wire connector and the trailer's 3-wire receptacle. This is an essential component for anyone upgrading to modern trailers without replacing the entire electrical system on their tow vehicle. SKU CW73850, MPN 118158.