Vehicle control units, namely, wiring harnesses, wire sets, cable sets, equipped with or without electrical sensors, and/or electrical sockets and electrical connectors to electrical vehicle systems; electrical power distribution units; controller input device; computer interface board and downloadable software systems in the nature of a battery management controller for measuring, remotely controlling, logging and monitoring voltage, temperature, current, relay activation for circuit prevention; electronic control unit for automobiles; computer hardware for vehicle control systems; vehicle control systems for optimal and safe operation of vehicles comprising electronic throttle controls, electronic light controls, vehicle lockout devices for use with electrical switches, isolation systems transformers, speed limiters for limiting vehicle engine speed, namely, aftermarket, add-on devices for vehicles in order to limit the maximum speed output of an automobile, electronic speed controllers, electronic speed reducers, electronic speed regulators, timers, speed zoning indicator devices, engine shutdown electric switches, fuel cap isolation systems comprising electrical controllers, electrical controllers for controlling the speed of vehicles, brake controllers for vehicles and temperature controllers for vehicles.