9 Control devices for vehicle parts, vehicle components, vehicle attachments, vehicle accessories and trailer hitches, namely, vehicle electronic controllers and remote controls for vehicle accessories for devices to detect, measure, and analyze motion, vibration, multi-dimensional distribution of force, pressure, acceleration and orientation; Apparatus for recording, displaying and reporting the operating and load conditions of vehicle parts, vehicle components, vehicle attachments, vehicle accessories, coupling devices, trailer hitches and tow bars for vehicles, namely, instruments, and devices for detecting, measuring, analyzing, and communicating motion, vibration, multi-dimensional distribution of force, pressure, acceleration and orientation; Operating and evaluating circuits provided with programs for recording the operating and load conditions of vehicle parts, vehicle components, vehicle attachments, vehicle accessories, coupling devices, trailer hitches and tow bars for vehicles, namely, operating and evaluating circuits with a programmed controller receiving and processing operating and load conditions of land vehicles and trailer hitches collected from vehicle sensors; electric sensors mountable on vehicle attachment parts, vehicle parts and vehicle accessories, parts of vehicles and trailer hitches and/or sensors for detecting the operating and load conditions of vehicle parts, parts of vehicles, attachments for vehicles, vehicle accessories and trailer hitches and tow bars for vehicles; Electric equipment and wire harnesses for vehicle accessories and vehicle attachment, namely, wiring harnesses, wire sets, cable sets equipped with electrical sensors and electrical sockets, cable sets equipped without electrical sensors and electrical sockets, and electrical connectors to electrical vehicle systems