Normally when your turn signal blinks very fast it means one of two things. Either you have a bulb that is blown or you have installed an incorrect Flasher Relay. Look an make sure all bulbs are functioning as they should be. If they are, then check to see if you have the correct Flasher Relay installed. If you do then replace the Flasher Relay.
you need to change the flasher can for the signal lights
turn signal relay is bad
Buy a "highway" turn signal flasher
Either the front or rear bulb is burnt out.
Bulb is burned out.
burnt fuse. check the fuse box
Are both lights coming on and staying on? sometimes when a light is out on the front or rear the lights just come on and will not blink.
Answer Usually when the flasher blinks rapidly it's about finished. Try replacing the signal light flasher and see what happens. If you still don't have Brake Lights start looking for a short.
You either have a bulb burnt out or the turn signal flasher is bad.
Maybe a short somewhere...did you replace the flasher unit? No - it was blinking spuradically(?) - now I have to blink it manually and it won't blink at all with lights on.
That can happen when there is a bad ground to one of the lights.
Check electrical grounds