I have a '97 3500 Manual trans. and I couldn't get mine to work. I stuck a test light in there, and apparently my B8 and B7 have power coming from them because it lit up when I had the gator clip on ground.. I tried taking the stop/haz fuse out too just to see if it had to do with the brake switch or clutch switch giving a signal still the same thing.. Anyone have any ideas?