SYSTEM AND METHOD FOR POWERING A VEHICLE ACCESSORY

A power supply configured for installation in a vehicle is disclosed herein. The vehicle includes a battery, an on-board diagnostics (OBD) port, and a vehicle accessory. In at least one embodiment, the power supply includes a controller area network (CAN) input configured for connection to a CAN pin of the OBD port, a battery input configured for connection to a battery pin of the OBD port, at least one power output configured for connection to a vehicle accessory, and a controller circuit. The controller circuit is configured to (i) monitor a CAN voltage provided via the CAN input, (ii) monitor a battery voltage provided via the battery input, and (iii) selectively deliver power to the at least one power output depending at least in part on the CAN voltage and the battery voltage.