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Well I am sitting at the dealer as I write this. My turn signal bulbs have been replaced 3 times in the past 12 months. I have a 15 5.0 and the latest event in this turn signal story is that the last replacement resulted in one bulb being considerably dimmer than the other. Changing the bulb didn’t have any effect, so Hyundai suggested changing the headlight assembly, which is being done now.
This dealer has been great to me, but this is really starting to be a pain.
I've had the above LED's in for about a month now. I still have hyper flash issues off and on and its totally random. Works normal one day and the next every other time it hyper flashes. It will even go back and forth while sitting with the turn signal on waiting to turn. But its still better than going through bulbs every month.
Mine so far only hyper flashed at the start of a turn signal click a few times... Havent done so in a few days though. They definitely look awesome. Much better than bright bulb/dim bulb each side. I can live with a short hyper flash here or there.
I did my polarity reversal by swapping the contacts in the wire connectors, everything is good, no hyper flash, I also noticed that my DRL uses the light strip on the bottom edge of the head light, not the turn signal bulb.