Anyone know what to check for as to why my turn signal flashes fast? This happens only on left turns. I switched the turn signal bulbs on the left side with the ones on the right (both front and rear), but it didn't solve the problem. The emergency flasher works fine (no fast flash, left and right). After reading in another forum that a blower motor speed can cause fast flash, I turned the blower fan to maximum and minimum speeds, but it had no effect on the flash speed. I'm thinking an electrical connection may have jarred loose from hitting all the potholes lately.