Hi - new here, just bought and installed my X930BT. I've tried this bypass, but still get the "parking brake connected incorrectly" message when the unit starts up. I've tried the "ghetto" bypass mentioned above with no luck, then put on one of the DB9 connectors with a separate chassis ground wire as well. I now have 5 wires grounded together - the green parking brake wire, the black/silver X930BT ground wire, the vehicle harness ground, the new bypass wire, and the chassis ground wire. I can't think of anything else except that maybe the DB9 connector isn't making contact inside the plug