I know what you're saying. The harness is the only part on the car that hasn't been physically removed 2 or 3 times at this point. When you think of how much a standalone is, it isn't that far to upgrade to a completely new harness.
I wish you the best of luck. I know how frustrating it could be. Luckily I made it just in time to return my original harness within the year for a refund. They too were extremely helpful in trying to figure out the solution, but were unsuccessful.