A fast turn signal blinking can be caused by a bulb that is getting ready to out or a bad ground. Remove the bulbs and look for corrosion around the base and in the bulb socket.
My 1997 Honda Accord was crashed into a snow bank, broke front left turn signal light(Bulb+assembly). Soon after the crash, the rear left turn signal began blinking rapidly. Several days after, the whole turn signal system shut down (all four blinkers stopped blinking). I replaced the bulb+assembly for the left, turn signal switch, and turn signal relay and checked the fuses. The hazard lights work, but the turn signals don't. I did everything I could replacing parts. Does anyone know what is wrong with my accord?
Defective flasher relay.
If your blinker is blinking at a faster rate than normal, it usually means that one of the bulbs is out. For example, if the left turn signal blinks faster than usual, check either the front or the rear left turn signal. If both turn signals seem okay, check the front left parking light. (this is the front orange light that is on when your headlights are on)
More than likely you have a burnt out bulb at the front signal light, rear signal light, or brake light on the right side.
It has been my experience that a rapid turn signal indicates there is a burnt-out signal light bulb (either front or rear) on the side of the rapid blinking signal. If the right signal is blinking rapidly, the problem is in the signal lights for the right side (front or rear) of the vehicle. Turn the rapid signal on and step out of the vehicle to find which bulb is not lighting.
Chainsaw?
Turn on that fast blinking signal light and check to see if the front and rear signal lights are both working, chances are you have a burned out bulb. If both front and rear bulbs are flashing fast, replace the flasher relay.
I would look at the REAR signal light on the same side of the car. It is probably not blinking at all and the bulb needs to be replaced.
Check that there are no burnt out bulbs. Some vehicles will either blink the turn signal faster or not at all, depending on whether the front or rear bulb is burned out. If all bulbs are functional, try replacing the flasher unit.
The turn signal Flasher Relay is located… Front seating area, center, under dash, mounted in front driver side of console.
A bulb has burnt out that is why it is blinking fast. Check the front and rear bulbs.
You have a broken spring in the steering column