Hey Scotty,
I have a 2009 Honda Civic that is hyper flashing when I put on the left turn signal. Changed the bulbs and they are working, but still hyper flashes. The right turn signal has no problem.
Is one of the bulbs on the left side LED?
LED lamps will cause hyperflashing.
What happens is the blinker knows that there is a lighter or smaller than usual load for the two bulbs. So the flasher or body computer/electronics will fast flash the lamps to indicate a problem.
The wrong kinds of bulbs can cause this. Make sure you have the proper lamps in the front and rear, not just lamps tha fit and work. They need to be the correct number and type. A thorough investigation of this will reveal the problem.
Let me know what happens when you check the lamps carefully.
Your Civic has a built in blinker in the electronics contained within the passenger compartment fuse box. There is some electronics in the back of that box which includes a blinker of some sort. It could be a blinker permanently soldered into the board or some electronic chips that control a relay... I have not examined that device before and there is no readily available data on it as it is a proprietary device. Someone might have a photo of it or a dissection on the internet which I am not aware of.
Let me know about your progress with this problem. I will be glad to explain more about how to approach fixing it.
PLEASE FIRST check the lamps to see that they are 100% original type and number. This is critical as there are several wattages of lamps that can fit in the sockets and this will affect hyperflash.
@autoelectrical
Thanks for the response, I just changed the rear left blinker bulb with the exact type if calls out for. A few weeks ago I did the same with the front, but I will check again if by mistake I replaced it with the wrong.
Sometimes they call for a different bulb in the replacement guides than the car was manufactured with. Let me know if you find a change. The wattage total of these bulbs is critical. The circuit judges the amount of power by drawing the current across a known resistor in that fuse box controller we talked about. The voltage drop across that resistor tells the box computer or controller how much current is being used. If it falls short, then it goes into hyper flash. Keep me posted.
It’s a way of the car telling you that the bulbs are failing/not compatible. Use OEM spec bulbs and the problem should solve itself.
If you are using the correct bulbs, it could also mean there’s an electrical problem though. Check all wires and ground connections.
@inthrustwetrust
I think most likely I have an electrical problem, but I wouldn't know where to start from. Any suggestions?