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I installed philips led bulbs and i noticed the turn signals blink too fast why is that? There the correct size too and fit fine.
 

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You need Can Bus compatible bulbs or to install some resistors...
i put the stock ones back in and the signals dont blink fast so its the led bulbs. Is it ok to leave the led bulbs in still even thought there blinking really fast or would that make things worse?
 

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i put the stock ones back in and the signals dont blink fast so its the led bulbs. Is it ok to leave the led bulbs in still even thought there blinking really fast or would that make things worse?


It’s called hyper flashing, which is very common with LED bulbs in turn signals unless you use ones with a resistor in place. Does not harm anything. It is just the computer not reading enough “feedback” from the bulbs since they use so little power. It’s equivalent to how it flashes if a bulb is out.


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It’s called hyper flashing, which is very common with LED bulbs in turn signals unless you use ones with a resistor in place. Does not harm anything. It is just the computer not reading enough “feedback” from the bulbs since they use so little power. It’s equivalent to how it flashes if a bulb is out.


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I dunno if im gonna keep the leds its kinda annoying with them flashing so fast..
 

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i put the stock ones back in and the signals dont blink fast so its the led bulbs. Is it ok to leave the led bulbs in still even thought there blinking really fast or would that make things worse?
There's a point where if they blink fast enough to closely mimic an emergency vehicle you could be fined, but going to try to avoid LEDs in positions where hyperblinking occurs personally.

(To test, remove a bulb, if hyperblinking starts, I won't replace those with LEDs).
 

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There are LED bulbs with integrated resistors and canbus circuitry now. I’m going to be testing some in a few days.
While I respect your desire to use LEDs/I like the longevity, the resistors defeat the energy savings, and sometimes/maybe most of the time they do not light up the lamp properly.
 

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(First post ever, sorry if I break any forum etiquette) Thanks for the link to Diode Dynamics. I have a 2008 fortwo passion. A while back, I bought the license plate LEDs from DD and they have been great. For some reason, at the same time, I decided to buy my tail light LEDs from smartmadness.com. Within a few weeks, the tail lights were going out, but the turn signal and the brake lights worked just fine. Do you think the Diode Dynamics LEDs will fix this? I'd hate to spend even more $ on more LEDs that don't work correctly. Thanks!
 

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(First post ever, sorry if I break any forum etiquette) Thanks for the link to Diode Dynamics. I have a 2008 fortwo passion. A while back, I bought the license plate LEDs from DD and they have been great. For some reason, at the same time, I decided to buy my tail light LEDs from smartmadness.com. Within a few weeks, the tail lights were going out, but the turn signal and the brake lights worked just fine. Do you think the Diode Dynamics LEDs will fix this? I'd hate to spend even more $ on more LEDs that don't work correctly. Thanks!

The brake light thing may actually be in the brake light switch. ?
 
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