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Old Apr 2nd 2013, 08:36 AM   #21
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Simple - but the OEM back, and see if there is an issue, that will eliminated the ECU if they then work, if not, you can take it in under warranty with the OEM on.
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Old May 30th 2013, 08:37 PM   #22
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Originally Posted by bronch View Post
Strange, I didn't have to use them and they work fine.
I am in the process of installing rizoma signals and did some experimenting because I was curious whether the resistors are needed or not and could not find a clear answer.

According to the rizoma directions if you are replacing a 10W bulb (OEM rear signals for US pani) then you are suppose to use one of the two included resistors for each signal. However, I couldn't help but wonder the euro version of the bike has LEDs in the rear and no additional resistors are needed when retrofitting these to a US bike.

With that being said and knowing there is no relay in the bike and the ECU directly controls the flash rate I had a hunch that the ECU was auto-detecting which type of indicator was installed by measuring the resistance on start up.

So I installed the rizomas with no resistors turned on the bike and the flash rate was normal front and rear. Turned the bike off, added one resistor, turned it back on and still the same flash rate. However, if I changed any part of the rear signals while the bike was on they would stop working. I also noticed that the resistor got extremely hot almost immediately after turning the bike on. Much hotter than I would expect it to get under a normal load.

This kind of supports my theory that the ECU detects what is present and adjusts accordingly, however I don't really have any proof of this. If anyone else has any additional info please share. For now I'm going to go with no resistors and see how it goes.

-B
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Old May 30th 2013, 09:56 PM   #23
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Originally Posted by Walsh View Post
With that being said and knowing there is no relay in the bike and the ECU directly controls the flash rate I had a hunch that the ECU was auto-detecting which type of indicator was installed by measuring the resistance on start up.
-B
Good theory and I would buy into that, but I have no idea. I tried first without the resistors before I installed the lights and they worked, so I went with it. No problems, unless all of a sudden it's causing my engine to die unexpectedly.
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Old May 30th 2013, 11:00 PM   #24
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I had read on a post that the leds would flash normal with the engine running. But on mine only the right one does that without resistor. The left one would flash once, then quit, and make the front signal flash fast. So I just wired a resistor for the left side. Although the right side did quit once.
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Old Jun 3rd 2013, 07:54 PM   #25
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Originally Posted by balzey31 View Post
I had read on a post that the leds would flash normal with the engine running. But on mine only the right one does that without resistor. The left one would flash once, then quit, and make the front signal flash fast. So I just wired a resistor for the left side. Although the right side did quit once.
I tested this out on mine as well and the same happened. However if the engine is running then both sides are fine like you said. Very weird behavior if you ask me...
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Old Jun 3rd 2013, 09:40 PM   #26
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When I installed my Rizomas I wondered the same thing about why the euro bike wouldn't need resistors but the US bike does. I installed without the resistor and it did exactly what the OP says his is doing. Put the resistor in and no issues since.
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Old Sep 8th 2017, 06:54 AM   #27
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Rizoma turn signal problem

Originally Posted by Walsh View Post
I am in the process of installing rizoma signals and did some experimenting because I was curious whether the resistors are needed or not and could not find a clear answer.



According to the rizoma directions if you are replacing a 10W bulb (OEM rear signals for US pani) then you are suppose to use one of the two included resistors for each signal. However, I couldn't help but wonder the euro version of the bike has LEDs in the rear and no additional resistors are needed when retrofitting these to a US bike.



With that being said and knowing there is no relay in the bike and the ECU directly controls the flash rate I had a hunch that the ECU was auto-detecting which type of indicator was installed by measuring the resistance on start up.



So I installed the rizomas with no resistors turned on the bike and the flash rate was normal front and rear. Turned the bike off, added one resistor, turned it back on and still the same flash rate. However, if I changed any part of the rear signals while the bike was on they would stop working. I also noticed that the resistor got extremely hot almost immediately after turning the bike on. Much hotter than I would expect it to get under a normal load.



This kind of supports my theory that the ECU detects what is present and adjusts accordingly, however I don't really have any proof of this. If anyone else has any additional info please share. For now I'm going to go with no resistors and see how it goes.



-B


You are a genius. I know its an old thread but i can 100% confirm the above is correct. I now have LED front turn signals that work.

Last edited by morenaz0; Sep 10th 2017 at 05:57 AM.
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