y law, a towed vehicle's running lights, turn signals and brake lights must mimic the motorhome's. This taillight kit accomplishes that with a set of bulbs and sockets which are mounted inside the towed vehicle's taillights. From the taillights, wiring (not provided) is then routed underneath the towed vehicle, to an electrical plug (not provided) mounted to the grille or fascia. Since the towed vehicle's electrical system is bypassed, this lighting method eliminates the concern of voiding the towed vehicle's warranty. Note: the towed vehicle's taillights must have room for an extra socket and bulb inside each lens housing.Product Description