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Automotive wiring load test showing 12 volts with no load and voltage collapsing under load due to a corroded high-resistance connector.
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How to Load-Test Automotive Wiring: Why 12 Volts Doesn’t Mean the...

John Huh -
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Seeing 12 volts at a connector doesn't prove the circuit is healthy. Learn how automotive wiring load tests expose corrosion, weak terminals, damaged wires and other hidden resistance.

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