CR104B Vehicle Electrical and Mechanical Systems Practice Test

Ground side means the return path for current back to the source. In automotive systems, the negative battery terminal is commonly connected to the chassis, so the vehicle’s metal structure itself can serve as the ground return. That means the ground side may include the structure of the vehicle. The current path from the load’s negative terminal back to the battery’s negative post is the return path that defines the ground side. Since both ideas describe the same return path concept, the best choice is the one that states both are true.