9 Electrical cables, connectors, and cable supports; wiring harnesses, namely, tractor and trailer wiring harnesses and electrical wiring harnesses consisting of electric wires and cables, connectors, resistors, switches, battery terminal connectors, power cables, speaker cables, and coaxial cables for use with heavy duty trucks, tractors, trailers and utility vehicles; wire testers, namely, plug circuit testers, socket circuit testers, ammeters, digital and analog multimeters, voltmeters, and ohmmeters for use with heavy duty trucks, tractors, trailers and utility vehicles; electrical terminals in the nature of electrical connectors, namely, wire terminals, bullet terminals, slide terminals, ring terminals, hook terminals, spade terminals, heat shrink terminals, insulated terminals, battery terminals, power sockets, electrical terminal blocks, and wire connectors, namely, crimpers and crimp connectors, butt connectors, slip-on connectors, solder connectors, and multi-wire connectors for heavy duty trucks, tractors, trailers and utility vehicles; electrical products for heavy duty trucks, tractors and trailers, namely, electrical connectors, electrical cables, electrical wires, battery terminals, wire terminals, electrical adapters, electronic controllers for managing power to trailer lights, and voltage monitor modules; electrical products for heavy duty trucks, tractors and trailers, namely, computer hardware for collection, storage, and communication of electronic data, including telemetry data for enabling bidirectional communication with a remote device, and computer firmware for controlling said computer hardware; electrical products for heavy duty trucks, tractors and trailers, namely, wireless receivers and transmitters of electronic signals; electrical products for heavy duty trucks, tractors and trailers, namely, integrated circuit control modules, integrated circuits, computer chips, flexible printed integrated circuits on film or on tape carrier package (tcp), printed circuit boards (pcb), and computer memory devices; electrical products for heavy duty trucks, tractors and trailers, namely, trailer voltage monitoring device; electrical products for heavy duty trucks, tractors and trailers, namely, trailer voltage monitor access device, namely, electrical junction box for monitoring voltages of electrical circuits within the junction box and indicating the status of said electrical circuits; electrical products for heavy duty trucks, tractors and trailers, namely, trailer voltage monitor access accessory, namely, electrical voltage monitor attached to a trailer voltage monitor access device and configured to visually indicate the status of electrical circuits; electrical products for heavy duty trucks, tractors and trailers, namely, trailer voltage monitoring system consisting of a trailer junction box and an electrical voltage monitor of electrical circuits within the junction box and indicating the status of said electrical circuits; electrical products for heavy duty trucks, tractors and trailers, namely, battery chargers