Did you install the original kind or the full electronic ones? When I got my Challenger on the road, the turn signals only worked half the time. I replace the flashers with new "original" style units and got the turn signals to work all the time. However, when coming to a stop, they would flash really slow. The full electronic flashers fixed that issue and they now flash at a consistent rate. You may have other issues but the electronic flashers are a good upgrade IMO. Good luck!