Diagnose and Fix a Fast Blinker with a New Turn Signal Bulb
If you have a blinker or turn signal blinking fast, there is an easy solution that almost any car owner can do. You may need a screwdriver or ratchet to remove the screws from the tail light or all you may need is a pair of gloves. All you need to do is change the brake light bulb.
Check out the video below around 0:33 to see the comparison of a turn signal flashing fast and a turn sign flashing at a normal rate.