If one bulb is burned out or there is any other circuit problem, the flasher won't flash. The GOOD bulb will just stay on. Check the bulb and socket in the one that's not turning on.
Normally this happens when one of the bulbs is burnt out. Make sure all bulbs are working.
If you turn on your 1999 mustang v6 car and the right signal light stays on and doesn't blink and you switch the car off and then the left signal light stays on without blinking, then you need to see a mechanic.
Check to make sure all bulbs are working properly
Either the front or rear bulb is burnt out.
your rear bulb is blown - replace the bulb The turn signal blinks fast because the bulb is going out. That is also why the others dont blink.
More then likely it needs to be replaced, if its the actual signal inside the car, turn it on check outside the car which one it is and replace!!
turn signal relay is bad
Buy a "highway" turn signal flasher
Flasher relay.
A. check and make sure all the bulbs are working. B. someone may have replaced the blinker itself with a aftermarket one that blinks at a diff rate.
Check to see if any of your front or back turn signal bulbs are not working. It's either a bad bulb or the turn signal/ hazard flasher relay in your fuse box.
Why would you want the blinker faster. They should blink at factory specs.