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Why would there be 12v between the negative cable and the post after all fuses are pulled?
Wiki User
∙ 18y ago
Its normal. There's two components to electrical power: voltage and current. A voltage is merely a "potential" to do electrical work. The amount of resistance in a circuit with respect to the amount of potential is what determines how much current flows. Its simple ohms law: Voltage = Current * Resistance, Power = Voltage * Current. Pulling the fuses out of the fuse box leaves an open circuit, which is an infinite amount of resistance. So by pulling your fuses, you prevent current from flowing, but you haven't taken away your battery's potential to do work (its voltage.) The voltage is always there as long as the battery is charged, but no current will flow or power be realized unless you reduce that resistance to something less than infinite by connecting a circuit to it (or in this case, completing the circuit again by replacing the fuses.)
Wiki User
∙ 18y ago
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