For import and domestic vehicles requiring a taillight converter to ensure proper towed vehicle light functions when tow vehicle has a different lighting system. Adapts tow vehicles with integrated turn and stop lights (2-wire system) to towed vehicles with separate turn and stop lights (3-wire system); works with incandescent bulbs only. All solid state components in converter; will not work with low-side switch or multiplex systems; cannot be reversed to convert a 3-wire tow vehicle to a 2-wire towed vehicle. Does not affect the functionality of the tow vehicle’s lights; includes instructions for installation. Backed by Tekonsha’s 1 Year Limited Warranty.