for those who did reply to my post

OK, I apologize. You did finally say what year you were working on in your original thread. But you did not wire it like it said in the instructions. Nor do the instructions say to remove the wiring on your ballast resistor. You did that and how are we supposed to know that? So, that being said. Did you totally remove this wiring from your engine harness or did you backyard hack it off and tape it into the main branch of the harness?
The easy solution would be to untape it if that is what you did and connect your signal wire (small red) there. If you get a back feed and the vehicle stays running after the ignition is switched off, you can add a diode that would limit the backfeed. (Also covered in MSD's instructions). Now don't blame MSD or us because you expertly modified your vehicle wiring harness. (What was that comment on being stupid?)