I'm helping a friend get all of the lights working on his 59 TR3A after someone did some "creative rewiring". I have managed to get all the lights to work, but the left turn signal lights, both front and rear are blinking at a much faster rate than the right side. Both lights blink. I know that the grounding can affect the blink rate, but will this occur if only one of the left turn signal lamps has a faulty ground? What other things can cause only the left signals to blink too fast? Can incorrect bulbs cause this problem?