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Automotive glossary: What is Ground? (Abbr.: GND)

Definition of Ground: On vehicles, the bodywork or frame also serve as electric ground, in other words as a collective conductor for leading back all currents to the negative pole of the battery (seen from a physical angle the current actually runs the other way, but that is insignificant regarding this). The ground represents the "zero"-level so to speak, to which all voltage declarations refer. So the ground cable of a consumer is just its connection to the bodywork. Should this connection be disconnected or broken, problems with the automotive electrics result.

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