4 wires are all that are needed to be "added" to the 12 pin connector. Those are L+, R+, and common audio, and a "drain" wire.
The real problem I see is that you are missing a connection to the Class 2 Data Bus. I wouldn't attempt to connect one of the other wires to it! You could really do some major damage to your truck's electronics! BTW, the airbags are tied into the Class 2 Data Bus! You did disconnect the battery, right?
My suggestion would be to temporarily connect the adapter up to test it. Just connect the yellow wire to battery + somewhere, and the black to ground. No need to solder, just run a jumper wire from some other 12v source (maybe the 12v power outlet connector). Then power up your radio to see what happens. Don't hook the red or orange wires to anything without first calling PAC!
I suspect you will be sending this unit back.
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