Assertion: resistor's voltage | /r/HasProperty | 9 volts
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text: this would be a problem if the ignition system (coil and points/ignition module) was set for 12~14 volts as at 9 volts you may have no spark, so they set the voltage at 9 volts all the time and use the resistor or a built in voltage regulator in the ignition module to bring the voltage down when the car is running and give it full voltage (9 volts) directly when the car is starting usually thru a bypass wire or switched connector.