hey guys ,left signal is flashing at a high rate , because the front bulb is not working ,but rear is . i changed the bulb and it was not blown , after some time it goes back to normal rate of flash. a month later same thing happens again, bulb is still fine. i am looking at a wireing schematic of that signal light but am wondering can a flasher be only partially gone and only letting it work sometimes, was thinking i am getting a short somewhere along the line, but that's gonna be some chore checking that whole line wouldn't it. anyone have any idea what would be doing this other than a short . thanks muchly fred