I have a 1999, highly customized Heritage. I am returning the lighting systems to the original, starting with the taillight and signals. I just put a new taillight and rear signal bar on the bike, along with a new wiring arness. The rear lighting system was a MESS, with voltage equalizers, side mount rear signals. I installed everything, and now, only the right side signals work. Left side, nothing. Any ideas about how to start the diagnosis?