A transient voltage suppressor (“TVS”) device includes a housing. Three prongs extend from the first end and are adapted for electrically connecting to an alternating current power source receptacle. Three recessed contacts extend into the second end of the housing for receiving three prongs from a power connector. The three prongs and three recessed contacts are adapted to pass electrical power along a ground wire, a neutral wire, and line wire, respectively. A protection circuit includes at least one silicon avalanche suppression diode (“SAS diode”) to limit high transient voltage imposed thereon to a lower level. A notification circuit is configured to communicate a status of the TVS device and configured to notify a user of one or more of: a correct connection of the vehicle wiring with respect to the power source, an incorrect connection of the vehicle wiring with respect to the power source, or a fault.