Test Relay 9v Battery

Test Relay 9v Battery
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You can test a relay with and without a 9 volt battery. If you apply 9 volts to it and it's sufficient to turn on the relay, the NO switch will close.
Relay testing. We've recently covered how a relay works.. If you apply power and ground (via a 9 volt battery, or your car battery) to pins 85 and 86, you should .

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