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James: Most signals flash fast like that to tell you the signal light is not working. Usually replacing the bulb fixes the problem. Since replacing the bulb is the easiest thing to try, maybe you should try another bulb. After that, you have to suspect a wiring problem or a problem in your turn indicator on the steering column.
check the bulbs and see if one is bad or the filament is shorted to the other circuit in the bulb..if not be looking at the control module or the relay..
firstly make all the bulbs glow in the indicator segment. this will moderate the flasher speed as due to even one bulb fused, causes other bulbs to glow at high rate.
If your turn signal indicator is coming on but won't flash, it is caused by one of two things.
A burned out bulb (or a bad circuit to the bulb)
Check ALL the bulbs. Does it flash in one direction and not the other? The side that is not flashing will have a bulb that is not working. It may be a front bulb or a rear bulb, so check them all. Also make sure that there are the same number of bulbs illuminating on both sides. Some cars have 2 turn signal bulbs on each side in the rear. At first glance it may look like they are all working, then when you look closer you may find that only one bulb is illuminating on one side while there are two on the other.
2. If both sides are malfunctioning and you are certain that all the bulbs that are supposed to light with the turn signals are working, then replace your flasher unit.
replace the rear bulb it flashs fast to let you know the bulb is bad, whatever bulb is not flashing thats the bad bulb, should be a 1157 bulb or a 1156 if it has one contact it's a 1156 if two it's a 1157
Hi Richard, Just a thought, I had a similar problem fitting Led bulbs to my Volvo and sorted it by putting the correct resistors in line.
Beware these get very warm so need safe/cool area for mounting.
if you turn on your right turn indicator and walk around the car you will likely find one of your bulbs are out or that your brake light is out on the right side. if all your indicators flash have someone press the brakes while you check the light.
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