To address the needs of the Internet of Vehicles, a plug and play visible light signal transmis. sion control device was designed for a vehicle lamp. In this device, the signal was first transmitted to a light-emitting diode(LED)driver via the DC power line and output as flashes of the vehicle LED lamp. The device was composed of a front-end circuit and a back-end circuit. The power switching was con. trolled by a high-speed on-off circuit in the front-end circuit based on the received input signal. The signal in the DC power line was then transmitted to the back-end circuit. Based on the signal, the VLC signal was sent by driving the flashing LED lamp. A capacitor was selected as the energy storage module after charge – discharge analysis. The communication between the front-end and back-end circuitry was achieved with 2-frequency shift keying(FSK)modulation and Modbus protocol. The device tests showed that the signal could be transmitted over the DC power line at minimum speeds of 4 Mb/s. The design and testing of the VLC parking lock control module also proved the feasibility of the communication and control functions. Thus, the proposed device could be a reference design for DC power line communication for an LED VLC system.