With a red clip to connect the backup battery cathode, black to connect the negative. Positive and negative polarity will burn the car computer. Plug the red light, and then insert the car OBD plug, this time has been issued by the sound of drops, indicating normal connection. OBD optimum alternating car computer power supply adapter connector memory device off battery replacing without disconnection. For a good battery, the first release of the tools of the red clip, if also drops at this time ring, indicating successful, if there is no sound, indicating that the fuse burned.
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