Has anyone ever used a flasher relay to fix the hyper blink problem when you install LED turn signal bulbs on a M37 or M56?,
If so...
(1) where did you purchase it from, or a part number for it?
(2) where do I find the stock flasher relay behind the dashboard?

You need to wire in some in-line resistors.

Like this:
https://www.amazon.com/gp/product/B00UN ... UTF8&psc=1

Flasher relays stopped being used about 10-15 years ago. BCMs now control the flashing. One thing to know about resistors is they use heat to draw power to keepp from hyperflashing. They get hot! Don't mount them near anything they can burn or melt. I don't use LEDs in my turn signals due to this.

Yes, they get very hot. Mount them to the crash reinforcement bars and use them as a heat sink. Don't zip tie them to any wire harnesses.

satown210 wrote: ↑

Thu Aug 16, 2018 4:48 am

Flasher relays stopped being used about 10-15 years ago. BCMs now control the flashing. One thing to know about resistors is they use heat to draw power to keepp from hyperflashing. They get hot! Don't mount them near anything they can burn or melt. I don't use LEDs in my turn signals due to this.

Thank you, I never knew that's they stopped being used, I just found out about them recently and being able to stop the hyper flash, I knew about the resistors but was trying to avoid cutting any wires or having be careful where I mount them due to the heating problem, I currently have LED turn signal installed on the car that claims to stop the hyper flash but they only work about 70% of the time, sometime you put the turn signal on and it doesn't hyperfalsh and sometimes it does.

satown210 wrote: ↑

Thu Aug 16, 2018 4:48 am

Flasher relays stopped being used about 10-15 years ago. BCMs now control the flashing. One thing to know about resistors is they use heat to draw power to keepp from hyperflashing. They get hot! Don't mount them near anything they can burn or melt. I don't use LEDs in my turn signals due to this.

Reviving an old thread here. Do you know anything about the LED bulbs that have integrated CANBUS decoders? I have four LED turn signals from Lasfit that have been installed for maybe two or three months. They don't hyperflash, but now I have some concerns regarding heat... The housings are aluminum and are designed like heat sinks. Guess I just don't want to end up with melted headlight/taillight housings.

I believe there is something about this in the FAQ section. If there isn't, Here is a DIY with pictures I did wayyyy back:
post6617606.html?hilit=resistor#p6617606

David__Allen wrote: ↑

Thu Mar 21, 2019 6:48 am

satown210 wrote: ↑

Thu Aug 16, 2018 4:48 am

Flasher relays stopped being used about 10-15 years ago. BCMs now control the flashing. One thing to know about resistors is they use heat to draw power to keepp from hyperflashing. They get hot! Don't mount them near anything they can burn or melt. I don't use LEDs in my turn signals due to this.

Reviving an old thread here. Do you know anything about the LED bulbs that have integrated CANBUS decoders? I have four LED turn signals from Lasfit that have been installed for maybe two or three months. They don't hyperflash, but now I have some concerns regarding heat... The housings are aluminum and are designed like heat sinks. Guess I just don't want to end up with melted headlight/taillight housings.

Same thing usually, just integrated instead of stand alone. Run the flashers or light for a while and feel how hot it is getting.

I used the plug-n-play decoders for my front turn indicators and they simply hang in the air and touch nothing. The rear tail lamps do not provide the room needed for the decoders but I used the standard resistors and made sure they do NOT permanently rest against anything that could be damaged. I did the same for my 07 M35 and between the two cars it's been a total of more than 5 years with no problems.

satown210 wrote: ↑

Thu Mar 21, 2019 3:23 pm

David__Allen wrote: ↑

Thu Mar 21, 2019 6:48 am

Reviving an old thread here. Do you know anything about the LED bulbs that have integrated CANBUS decoders? I have four LED turn signals from Lasfit that have been installed for maybe two or three months. They don't hyperflash, but now I have some concerns regarding heat... The housings are aluminum and are designed like heat sinks. Guess I just don't want to end up with melted headlight/taillight housings.

Same thing usually, just integrated instead of stand alone. Run the flashers or light for a while and feel how hot it is getting.

Are lasfit led turn signals still working on your car? I think about to buy led turn signals from lasfit

I also want to get LED turn signals for my car. I got my wife some for the front of her '16 QX60 (these) and they don't hyperflash until they are on for like 5 minutes straight. If you have the hazards on, they never hyper flash. However, I heard that if I install LED bulbs in the back, they will all hyperflash, not sure how true that is.

EDIT: Both the '16 QX60 and my '11 M56x have the same 7440 turn signal bulbs, so I'm just going to pick up 2 more sets for my car and call it a day. I can vouch for them, wife has had them for about 2 months now without any issues. Again, as long as you don't run one side for 5+ minutes, you shouldn't get hyperflash.

Ilya wrote: ↑

Thu Aug 15, 2019 7:07 am

I also want to get LED turn signals for my car. I got my wife some for the front of her '16 QX60 (these) and they don't hyperflash until they are on for like 5 minutes straight. If you have the hazards on, they never hyper flash. However, I heard that if I install LED bulbs in the back, they will all hyperflash, not sure how true that is.

EDIT: Both the '16 QX60 and my '11 M56x have the same 7440 turn signal bulbs, so I'm just going to pick up 2 more sets for my car and call it a day. I can vouch for them, wife has had them for about 2 months now without any issues. Again, as long as you don't run one side for 5+ minutes, you shouldn't get hyperflash.

I actually have those OXILAM bulbs in my taillights now, with a different set of "generic" LED bulbs in front (near identical design - I have a feeling most of these are produced in the same place in China). Mine don't hyperflash unless I leave the turn signals on for a long time, as you mentioned. That's by design, though, the bulbs cause the hyperflashing once they reach a certain temperature.

TLDR, I can also vouch for those LEDs. Bright as hell, too.

JDMZguys wrote: ↑

Wed Aug 14, 2019 9:06 pm

satown210 wrote: ↑

Thu Mar 21, 2019 3:23 pm

Same thing usually, just integrated instead of stand alone. Run the flashers or light for a while and feel how hot it is getting.

Are lasfit led turn signals still working on your car? I think about to buy led turn signals from lasfit

Yep, I had to replace the rears because when I had hail damage (tail light cracked) the shop that did the work didn't put my LED bulb back in

But the fronts work great!

PS Sorry for double post if that's against the rules

David__Allen wrote: ↑

Fri Aug 16, 2019 9:04 am

Ilya wrote: ↑

Thu Aug 15, 2019 7:07 am

I also want to get LED turn signals for my car. I got my wife some for the front of her '16 QX60 (these) and they don't hyperflash until they are on for like 5 minutes straight. If you have the hazards on, they never hyper flash. However, I heard that if I install LED bulbs in the back, they will all hyperflash, not sure how true that is.

EDIT: Both the '16 QX60 and my '11 M56x have the same 7440 turn signal bulbs, so I'm just going to pick up 2 more sets for my car and call it a day. I can vouch for them, wife has had them for about 2 months now without any issues. Again, as long as you don't run one side for 5+ minutes, you shouldn't get hyperflash.

I actually have those OXILAM bulbs in my taillights now, with a different set of "generic" LED bulbs in front (near identical design - I have a feeling most of these are produced in the same place in China). Mine don't hyperflash unless I leave the turn signals on for a long time, as you mentioned. That's by design, though, the bulbs cause the hyperflashing once they reach a certain temperature.

TLDR, I can also vouch for those LEDs. Bright as hell, too.

Yep. Very bright. My wife has had a few, ugh, accidents...so I'd rather people see her coming from 10 miles away lol.

satown210 wrote: ↑

Thu Aug 16, 2018 4:48 am

Flasher relays stopped being used about 10-15 years ago. BCMs now control the flashing. One thing to know about resistors is they use heat to draw power to keepp from hyperflashing. They get hot! Don't mount them near anything they can burn or melt. I don't use LEDs in my turn signals due to this.

They do get hot, in order to simulate an incandescent signal lamp they must dissipate 25 to 30 Watts--try wrapping you hand around a 25 Watt soldering iron if you want to see how hot. They also defeat any power saving that LED lamps might provide. The old flasher modules were thermo electric devices in which the lamp's current draw caused a heater to flex a bi-metal strip and toggle the contacts making the lamp blink--Body Control Modules on many (most) new cars don't care about the lamp's current draw and will work with LED lamps--the exceptions are those that actively monitor for burned out lamps by expecting a certain draw, and may consider an LED to be a burned out lamp.

THe BCM on my '98 SL500 will blink the parking light if it senses a burned out signal lamp...

Just got done installed the lights in my car, couldn't be happier.

post6795979.html#p6795979

So, looping back on this. A day or two after the install, I was driving and learned that these hyperflash after about 20 seconds. Probably because I have two sets. I read this on some of the other brands that they could ONLY be installed in front or rear...not sure why this is a problem. But these hyperflash in random patterns...start slow, then fast for 10 seconds, then slow for 2 seconds, then fast for 5, then slow for 10. It's weird lol.

I really don't see the point of changing the turn signal to LED, not with the hassle that comes with them and they're only used a fraction of the time.

Yoda's Master wrote: ↑

Tue Nov 12, 2019 8:02 pm

I really don't see the point of changing the turn signal to LED, not with the hassle that comes with them and they're only used a fraction of the time.

It looks much more modern. They are also considerably brighter, which could come in handy in the safety department some day if you put your hazards on on the shoulder in a foggy area.

Ilya wrote: ↑

Tue Nov 12, 2019 1:26 pm

So, looping back on this. A day or two after the install, I was driving and learned that these hyperflash after about 20 seconds. Probably because I have two sets. I read this on some of the other brands that they could ONLY be installed in front or rear...not sure why this is a problem. But these hyperflash in random patterns...start slow, then fast for 10 seconds, then slow for 2 seconds, then fast for 5, then slow for 10. It's weird lol.

Confirmed this is the issue. I removed my rear LED turn signals and now my fronts work fine until they get hot and then the flashes start (but it's now like 40 seconds after running not 5).

I have been using LED turn indicators for years on both of my Ms. I used resistors and regardless of how much time passes whilst I wait for the green in the turn lane, they never hyper flash and have never failed. Here is my post: post6617606.html?hilit=resistor#p6617606
It has lost it's pictures because TinyPic stopped hosting, but the info is still there.

I recommend using Vleds website. Find your bulb size, then go to Ebay / Amazon and find plug-n-play resistors designed for that size bulb (one per bulb).

Larz wrote: ↑

Fri Dec 27, 2019 9:30 pm

I have been using LED turn indicators for years on both of my Ms. I used resistors and regardless of how much time passes whilst I wait for the green in the turn lane, they never hyper flash and have never failed. Here is my post: post6617606.html?hilit=resistor#p6617606
It has lost it's pictures because TinyPic stopped hosting, but the info is still there.

I recommend using Vleds website. Find your bulb size, then go to Ebay / Amazon and find plug-n-play resistors designed for that size bulb (one per bulb).

All of the bulbs I have use built-in resistors (bulbs are massive) and I purchased them specifically for that reason (so I don't have to mess with soldering myself, etc. although I am more than capable). I may have to eventually bother with it though because it really is annoying at long lights.

Is there a down side to leaving LED alone to Hyperflash?