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Tester allows you to quickly check the correct power supply in the car's OBD2 diagnostic connector to prevent the failure of electrical equipment.
Sometimes for protection against theft it could be changed of polarity in this OBD2 diagnostic connector.
This tester can be used also to validate other connectors through the corresponding adapter (e.g. BMW20pin-OBD2F)
In case of correct polarity, the green LED lights up and in case of wrong – the red LED. If there is no power nothing lights up. The device has been made in the case of OBD-2 connector, it’s easy and compact.
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