”. First we check the resistance of the primary winding, so between the coil’s ground (a metal cube, which.
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Normally, I would expect copper wire, measured with a ohmmeter to show close to zero resistance.
Unless you are using a $ 45,000 signal generating testing machine your results are wothless.
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21 Ω.
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Once a spark has struck, the voltage across the spark gap in a running engine drops to a relatively low value, in the order of 1500-2000 volts.
However on my vehicle for example, the primary winding is specified at 0.
The ECM provides the voltage to the primary coil winding.
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Kilovolts or kV is the unit used to measure the output of an ignition coil.
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The secondary winding resistance should be 3-5k Ohms and this can be measured between the side terminal connection to the H-T lead and ground.
Next, you'll want to measure the resistance of the secondary coil, and this is the real business-end of the spark-producer.
The procedure involves using a digital multimeter (set to ohms) to check the resistance of the primary and secondary windings inside the coil.
Since the current flowing through the winding makes the resistance for the voltage drop, it mirrors the primary ignition coil waveform made with an inductive amperage clamp (lower pane of Fig.
