tireburner, i looked it the trunk and im assuming the "harness" is a black circular think to hold wires running through the trunk. Well, i grounded single pin plug thats running through a small rectangular box and nothing happened. Is their an easier way to program it such as grounding the pins located at the data link connector. I grounded the data link connector in the olds 88 a few months ago from your instructions and it worked fine.