ElectricMotorcycleForum.com
Tech => Tech Help => Topic started by: Bruno DSR on May 20, 2021, 04:13:09 PM
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Hello,
I'm new there. I have a problem with my DSR since a few days now. I've lost my 12V (lights, turn signals, stop, horn, dashboard back light). The battery is charging properly to 100%. The motor is functioning properly too. Is anyone has the electrical drawing of a DSR? The light is flashing one when I turn the key. Sometimes the 12V is coming back during the ride but less and less often.
Any idea?
Thanks!
Bruno.
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That usually means your DC-DC convertor is failing. You can check for loose connections but it will likely need to be replaced. About a $400 US job, unless you're still under warranty.
Sorry for the bad news on your first post.
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I occasionally briefly loose the 12v on my 2016 DSR.
It’s only very infrequently and brief so I’ve not yet figured out what’s causing it.
I also have a BMW R1150RT that had a similar occasionally loss of 12v that I traced back to an intermittently open Circuit on the main wire coming into the ignition switch.
Maybe try removing the headline & wiggle wires around?
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The unofficial manual has lots of good information.
https://zeromanual.com/wiki/SDS_Platform/Schematic
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Thank you very much for your replies. I was thinking the same about the DC/DC converter. But I forgot to mention that the 12V is working evry time the bike is plugged at least 2 hours. So, I was wondering if there is a capacitor in series of the DC/DC converter.
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The OBC supplies some 12v, doesn't it? Which is why the bike turns on when plugged in?
-Crissa
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It sounds like the DC/DC converter has failed in such a way as to cut out when the main battery drops below a certain voltage.
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Thank you very much for your replies. I was thinking the same about the DC/DC converter. But I forgot to mention that the 12V is working evry time the bike is plugged at least 2 hours. So, I was wondering if there is a capacitor in series of the DC/DC converter.
A capacitor in series would block DC, so I assume you mean in parallel. But no, there won't be, so perhaps something is breaking down after it warms up for a couple of hours.
-Don- Reno, NV
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Bruno, the bike in my profile pic is a 13 and those were the symptoms I had. I lost the dash for just a few seconds. It barely caught my attention. Over the next few days it would go out more often and stay out longer.
I looked at the manual link that Staples gave you and that seems to be how the DC/DC dies. The older 13s only had a 3kw max limit where as the later ones have a 5kw limit but the same size.
The thing is really buried in there and I just wasn't able work in that tight space to replace it. I got the unit and some of the aluminum tape to go around it and had the dealer replace it and give me the old one.
For me it fixed the problem 100%. Yours could have a wiring issue, either loose or broken but as you already know losing all your lights and info gets pretty scary and can get you killed if your riding in the dark.
I strongly suggest either replacing the unit or taking it to a dealer and they can run some tests but if it's working when they look at it then there isn't much they can do until it fails again. I didn't want to pay for shop time looking over a lot of possible causes so I rolled the dice with just replacing it.
I hope it works out for you but it does cause a very dangerous situation losing all your lights.
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Thank you again.
I think I will go for a DC/DC converter replacement, and I will let the dealer doing it. :'(
Actually I was ready to do that at first, but what I observed later (12V OK after the bike is plugged for a certain time, whatever the remaining % is) tells me maybe it's something else that just the DC/DC converter. But I'm maybe just too complicated in my mind...
And 12V is not just lights off, it's turning lights, stop light, horn, and ABS off too... very dangerous.
Bruno.
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As soon as I orderer a new DC/DC converter I didn't get any problem since... I think the problem might be the temperature: now it's above 20degC in Paris (summer is coming yeah!) while it was about 15degC when I had the problem.
I received the new one (it's a 500W, my old one was a 300W) but I will wait for the fall season to replace it....
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Now the temperature is going down, I have to replace the DC/DC converter (it was working during the summer temperatures). Does anyone know how complicated it might be? Thanks in advance.