Apparatus and instruments for testing vehicles; apparatus and instruments for testing trailers, caravans, camper trailers or the like; apparatus and instruments for testing the electrical circuits of vehicles; apparatus and instruments for testing the electrical circuits of trailers, caravans, camper trailers or the like; apparatus and instruments for testing the lights of vehicles; apparatus and instruments for testing the lights of trailers, caravans, camper trailers or the like; adaptors for electrical plugs or sockets for vehicles, trailers, caravans, camper trailers or the like; batteries for use with vehicles, trailers, caravans, camper trailers or the like; diagnostic apparatus for use with vehicles, trailers, caravans, camper trailers or the like; electrical apparatus for vehicles; electrical apparatus for trailers, caravans, camper trailers or the like; electrical cables for vehicles, trailers, caravans, camper trailers or the like; electrical plugs for vehicles, trailers, caravans, camper trailers or the like; electrical sockets for vehicles, trailers, caravans, camper trailers or the like; test devices for electric relays of vehicles; test devices for electric relays of trailers, caravans, camper trailers or the like; electric test boxes for testing the lights of vehicles, trailers, caravans, camper trailers and or the like; test apparatus for testing the lights of a trailer and or the lights of a towing vehicle; test apparatus for testing the lights of a truck and or truck trailer; test apparatus for testing the lights of a trailer and or the lights of a towing vehicle while visually inspecting the lights; test apparatus for testing the lights of a truck and or truck trailer while visually inspecting the lights; parts and fittings for any of the foregoing; and excluding apparatus relating to jockey wheels for caravans and trailers