Hi Wilson,
I had trouble with some of the female bullet connectors failing. The molded
silicone supporting the female bullet pins just crumbles away into a bunch of little pieces, then the pins can fall out or push down so they don't connect.
Get a flashlight and see if A2,A3,& A6 female pins are not pushed down so your
jumper doesn't connect. If they are gone you can get new pigtails from Dave Barton to splice in there.
If that isn't it, check the FAQ, I think there's a section help you troubleshoot OBD circuitry.
Keep cool, Bill
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