If you've tried his jumper setup and you still can't get full connection through the OBD2 then you might have a cracked OBD2 block like I did. I grabbed a block from a wrecked vehicle and rewired it.

No guarantees that this is your issue but all it takes is someone to wiggle the shit out of the block with a cable installed and stuff gets moved out of the pin holders. (For me at least)

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"When the Team Chief said.... You're trapped in a hole with nothing but a goat and a slinky, what do you do? Stubby said, I'm not sure but it won't end well for the goat...." ~(Overheard) Last day, Phase 3, Q Course