When I took delivery of my '06 FLHTCUSE I had the dealer install the run/brake light module, so that the rear turn signals would act as brake lights when the brakes were applied. My thought was the more brake lights the better to be seen. I had had several people tell me that my turn signals looked like the brake light was on all the time. I decided to go with the Radiantz LED lights for the brake light and turn signals. When I made the change, the problem was even more visible, (looking like the brake lights are always on, on the turn signals) Anyway, I talked to the tech guy at Biketronics, and he told me that he had encountered a problem with the HD run/brake module. He said he had heard there was a recall on some of these modules because they don't make much of a distinction between run and brake, and it appears that the brakes are always on! I ordered one of their run/brake modules and will install as soon as I get it. I'm expecting to see a big change. I will post the results as soon as I get it later this week. The folks at radiantz have been great to work with, and hopefully if any of you are experiencing this same problem, I may have found the solution for you. Will let everyone know the results.