I tried that method and a coupe wiring is much different then the roadster. I think it's because the trunk light only comes on in the roadster when you open the trunk lid. Anyway I figured it out on my own I had to tie into the red with gray stripe to the red wire to the lights and the blue with white stripe to the solid brown wire of the lights. I did a search on the forum and nobody tied to the blue wire but it works properly.