9 Apparatus and instruments for carrying out diagnostic tests and measurements on motor vehicles and components thereof and for producing protocols of the results, namely brake testers, plate-type brake testers, roller-type brake testers, vehicle steering geometry testers, vehicle track testers, vehicle camber testers, vehicle suspension testers, testers for vehicle lighting, shock absorber testers, and vehicle weight testers and corner weight measuring apparatus, including plate-type combination testers and hand-operated electronic controllers for such apparatus and instruments as well as measurement display panels