Left Turn Signal Flasing Very Fast

Get the left signal to flash fast then walk around the car to see which light isn't flashing then change the bulb or socket if they all appear to be flashing (front and rear) turn on the right turn signal then look into the front and rear lens and count the number of bulbs flashing, now do the same thing on the left. Many times there's more than 1 bulb in each lamp. I hope this helps. Take care.

Buy a two pack of turn signal bulbs. Change the front and rear left bulbs and try it out. If you're lucky, you're done and got away cheap. If not, start chasing electrons. Not an overly complicated circuit, the signal is quick flashing because you have an inoperative lamp.

The wire feeding the front left turn signal is likely crimped or stretched and touching the body somewhere. Do you best to trace the left front turnsignal wire back as far as you can - even just jiggling it might give you short term solution (although it will probably come back).
The fast flash of the rear light is because the short up front is letting too much electricity run through the flasher module. This makes it run too fast. Find the short up front, and both problems will be solved.

Hello. You may have a faulty turn signal switch or an expensive relay module. A turn signal switch is way cheaper than a relay module.

sounds like a fuse is blown. check your fuses

if the bulb flashes fast then you need to replace one of your bulbs i had the same problem on my mustang the right turn signal flashed like a mad man the problem was the brake light on one of the bulbs died

if its a bulb then go to a repair shop(not dealer) to have it replaced.if the bulbs are working then its a flasher.

Usually a fast flashing signal is because one of the bulbs is burned out or shorted out. If the signal and brakes use the same light which many cars do then check the wiring to it and replace bulb. If burns out again then it has a short between the signal switch and the actual light or the brake wiring to it is shorted.

Replace the burned out bulb. It is flashing fast to alert you that bulb is burnt out. Turn on the side that works properly & note all bulbs flashing in front, rear & side. Most likely there is at least 1 burnt out on the other side.

Could be several things but generally this happens when one of the turn signal bulbs is burned out (front or back), especially if it is fast on one side (left vs right). Once the burned out bulb is replaced the flashing returns to normal.