OBD Port Not Working? Check The Fuses

If you ever plug a scanner into the OBD-II port on a car and it doesn’t turn on or can’t connect, chances are it’s just a blown fuse, as they often share with some other circuit.

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I was trying to do a state inspection on a used Kia Soul we’d just sold, but the inspection computer couldn’t communicate. Looking through the fuse lists, nothing said whether it affected the OBD connector, so I had to start looking on the internet. A wiring diagram for the connector showed me that the fuse for the interior rearview mirror also provides power for the OBD port.


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-Dan

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