You have a broken spring in the steering column
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.
Defective flasher relay.
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.
Check to see if the brake lamp and turn signal lamp are the same bulb. If so, its a bad bulb. See sources and related links below to lookup bulb information.
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.
The turn signal Flasher Relay is located… Front seating area, center, under dash, mounted in front driver side of console.
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.
A bulb has burnt out that is why it is blinking fast. Check the front and rear bulbs.
Usually, a fast blinking turn signal means one of the outside turn signals (front, back and side) lights is burned out.
you have to go inside engine compartment to the front right side,then reach in and disconnect signal/parking bulb holder electrical connector.Then rotate the turn signal bulb holder 1/4 turn COUNTERCLOCKWISE to remove it.
When any turn signal on a vehicle flashes more rapidly than normal, then that means that a signal light on the side that is blinking is burned out. It could be either the front of back. You should check your signals to see if one is burnt out. The brake however should not affect this - you could have a short.
The new bulb is already burned out, not seated properly in its socket, or you replaced the wrong one. Get out and look at the signal lights while they are blinking fast. Either the front or rear light is not blinking at all. That is the one that needs to be replaced.