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Discussion Starter · #1 ·
The following is a lot of speculation, but may be of some help to those that are interested in the euro-spec led "winkers". If you're looking to keep the wiring 100% stock, I wonder if a euro-spec flasher relay would function in place of the us-spec one. It seems that the us-spec lights are just 2-wire in front and rear, so the relay seems to be what is regulating the voltage for the running lights. It seems that an aftermarket relay can replace this and provide a more regular turn signal function. (see image below)

https://photos.app.goo.gl/z3WPBrQqy49JTks83

This image was sent to me from 12oclocklabs.com, who makes an aftermarket led turn signals. This is what they had to say:
Hi Dan,
The Africa Twin CRF1000 uses the same connectors as the CRF250L 2pin type.

For the Africa Twin, the stock flasher relay must be replaced with our fixed rate flasher unit, I have attached the wiring for that install.
The reason the stock flasher relay must be replaced is because the stock flasher relay modulates the front signals. Our ATS signals are not compatible with a modulated voltage supply, thus changing the stock flasher relay to our fixed rate flasher relay solves that issue.

This leads me to believe that perhaps the relay module, instead of the ecu is the only component that handles turn signal duties, as its been speculated i think in other threads I've seen that perhaps the euro-spec leds are controlled by the ecu. I think that the turn signal relays on this bike are quite different from the turn signal relays we're used to on most motorcycles, which would normally be a pain in the ass except that if the euro-spec and us-spec bikes only difference is the relay itself, it might lend to a swap that is 100% oem with no need for extra wiring in the turn signals. I know that the relay is a pain in the ass to change, but I think that some people may be interested in this possibility if it keeps everything stock. That being said, when I looked up the euro-spec relay for our bike, it is prohibitively expensive, like $300 bucks. But, after some digging, I am thinking that there are other relay modules for Honda bikes with LED turn signals that might work. Once again, this is all speculation, and I'm not concerned enough with changing to a 100% oem euro-spec led setup that I am willing to drop the cash on this, but I would like to share what I've found if someone else is.

Here is a euro-spec Africa Twin turn signal parts page.
https://www.lingshondaparts.com/honda_motorcycle_parts_selection_pfk?block_01=73821&block_02=block_73821.png&block_03=989&block_04=lp&block_05=hmc

And here is another bike (Honda VFR1200XD 2013).
http://www.lingshondaparts.com/honda_motorcycle_parts_selection_pfk?block_01=67353&block_02=block_67353.png&block_03=879&block_04=lp&block_05=hmc

And from another site, the same bike, but with part numbers that are more searchable.
https://www.motorcyclespareparts.eu/honda-parts/motorcycles/vfr1200xd-2013/f-35-winker-633718.aspx

If you look at the diagram, both parts, while different numbers, are identical in appearance. They are also similar in price. However, the price for the blinker relay on the VFR1200 is SIGNIFICANTLY lower.
https://www.motorcyclespareparts.eu/honda-parts/motorcycles/vfr1200xd-2013/f-38-10-sub-harness-633702.aspx

A search for that part number, 38301-MGH-642, yielded a result from partzilla for only $42 bucks.
http://www.partzilla.com/parts/detail/honda/HP-38301-MGH-642.html

Now, since this is all speculation, I cannot guarantee any of this will work, I dont know if the connectors or pinouts on this other relay are compatible with the us-spec bike. But I think that it's worth noting, and perhaps someone with more time and money than me can explore this possibility further.
 

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Discussion Starter · #2 ·
Another possibility I just thought of is maybe this relay would also allow the installation of aftermarket LED turn signals with the same functionality as the factory LED's. This is something I might be interested in trying as a cost effective alternative to the full oem euro-spec led turn signals.
 

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That's interesting research. The big difference between the 12 O'clock Labs LEDs and the OEM ones appears to be the voltage that they run at. The lens of the OEM blinker clearly states 5-9V, though as I have documented current limiting is required above 7V to prevent thermal runaway. Is it possible that the OEM LED relay is modulating the 12V unregulated bike bus voltage such that the average voltage is ~7V? I guess. We know the relays are modulating on the US bikes (that's how the running light dimming works) so it makes sense that would be the case on the Euro or 3rd party relays. But whether a voltage regulator is also part of the relay circuit is unknown. An oscilloscope read on a Euro bike would be very useful in that regard.

I agree that replacing the relay could be the best approach from a simplicity of parts perspective. How this correlates with cost is less clear since removing the tank to get to the relay is a big hassle and potentially an expensive mechanic's bill if you don't DIY.

And the other question that has not been satisfactorily answered is why the US wiring is different from the Euro wiring. While it turns out that the US bikes do not have a 3-wire connection to the front blinkers as suspected, that third conductor is still shown on the wiring plan. How that translates to ground truth will remain unknown until someone wants to tear apart the headend wiring harness, which I don't.
 
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