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thanks for the reply but i didn't understand what is the switched 12v and a ground?
i know you mean to power the WB commander with a 12v source but i didn't understand how?
The WBC requires a switched 12v source (hot only when key is on) and a ground to operate. The there are two wires (signal & ground) from the WBC that go straight into the HPTuners Pro interface. Use the pre-configured pid in HPTuners and you're set to start logging!