These heavy truck systems include heavy duty drive axles, electric drive systems, front non-drive and drive steer axles, wheel end, drum and disc brakes, air brakes, hydraulic braking components, transfer cases, trailer suspensions, trailer axles, tire inflation and EV systems as examples. Must be able to understand mechanical operations regarding component functions and failure analysis as some of these components have a heavy reliance on electrical components, candidates must also have a strong background in electrical troubleshooting, strong understanding on wiring schematics and electrical diagnostic principles, and practical application experience.