Ok on my S model that I bought, the turn signals won't flash. It has the flasher mod done to it that uses the heavy duty flasher from auto parts store. They just stay on. No flash. THe front flashers were disconnected for a few weeks and the flashers were used, which shorted out the main fuse. There was a bit of heat damage to the wiring to the flashers. But I taped it up pretty good. Any clue as to why they won't flash?