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There is no functional reason for a car to have positive or negative ground. Historically, early telephone and telegraph systems grounded the negative side for corrosion resistance. When cars were developed later, some manufacturers adopted positive ground from these earlier systems while others used negative ground. In the mid-1960s, the automotive industry standardized on negative ground as new solid-state electronics like radios became common in cars and required a standard grounding polarity. A car with

Author

Kate Catherine Ramos

Language

EN