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How do you check for amperage draw in a 12 volt car electrical system?

April 26, 2017amperage car draw electrical system Volt

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How do you check for amperage draw in a 12 volt car electrical system?

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Place a large gauge wire of known resistance in series with your battery, use a high precision volt meter to measure the voltage drop across this piece of wire, then divide the measured voltage drop by the resistance of the wire. This will give you the current traveling through it.