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turnSignal swap

E

Edwin71

Joined Jul 2017
5 Posts | 0+
The Netherlands
I wonder if someone can help me with me problem.

I have a Hyperstrada 821 from 2013. I have changed the standard handguards for the handguards from the 932.
Everything fits normally. I only have to change the connections. I have soldered the old one so everythings fits fine.

So when i turn the ignition on the signal lights works fine. Also at the normal frequentie. Perfect I thought.
After a while the front ones stops working, and the turnsignal on the back is blinking rapetly.
When the front signal lights are not working it just flashes one time, everytime I use the turn-signal.

After a while (or turn the ignition on again), everything works fine.

I have some questions.
1) Can someone tell me how to solve this?
2) I have a lot about resistance. I have not used them. I thought these were only for changing the blinking frequentie.
3) does anyone know what makes it flash? Is it the lights itself or the computer on board of the Hyperstrada?

Thank you for responding.
 

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I believe it's because your new turn signals are LED.

I'm guessing the rears are still incandescent bulbs? So you'll have a different draw in current through, front and back.

My understanding is, if you use one of those LED ballasts (or whatever they are) that should resolve your issue. Probably loads in Google search!
 
Thank you for your response.

Is the computer then shutting the lights off?
I thought the led balast was just for the frequentie.
 
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It's possible that the wiring harnesses of the 821 and 939 are different, incandescent bulbs don't require current limiting resistors like LEDs do. So it's possible you ran too much current through your new turn signals, burning them up. Hopefully that isn't the case!
 
For now they keep working, after a reset (or just waiting). So there not burned.
 
There is a way to adjust your turn signal settings through the dash display. I believe you have a choice between "lamp" and "led". Adding resistors defeat one of the purposes of installing LED lights, lower power draw. Instead of the excess voltage going into the incandescent bulb, the resistor bleeds off the excess voltage into heat on the LED. I believe there is a couple posts here that shows the way through the menu tree to arrive at the settings.
 
Would that work with a mixture of bulbs though?

It might be better to do as Araitim suggest but I'd personally balance my system by using LED bulbs in the rear too.

That's my tuppence anyway!
 
Hogbot,
I did the same convertion as you-I have a Hyperstrada 821 and bought the led handgaurds from a hyperstrada 939.

After installation- when the engine is off, the led turn signals flash normally. When the engine is running, the signals flash once, then don’t work-and the rears flash faster. I tried installing some resistors of unknown ohms in parallel and they didn’t seem to work either. The resistors were some old ones that came from a rizoma turn signal kit.

The original huperstrada 821 turn signal bulb is 10w. The led signals are 2.2w. So I need a resistor of around 14 ohms. Didn’t have anything like that at hand, so I thought the original 821 bulb is a kind of resistor. I wired it in series with the led signal and it worked with the engine running. Normal flash rate! I didn’t try to wire it in parrallel.

I went online and found a 10ohm 10w resistor at RadioShack. When I get them, I’ll wire it up and see if it works. Hope that helps
 
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Araitim said:
There is a way to adjust your turn signal settings through the dash display. I believe you have a choice between "lamp" and "led". Adding resistors defeat one of the purposes of installing LED lights, lower power draw. Instead of the excess voltage going into the incandescent bulb, the resistor bleeds off the excess voltage into heat on the LED. I believe there is a couple posts here that shows the way through the menu tree to arrive at the settings.
Click to expand...

I know there’s no user menu in the 821 but, the dealer plug in their computer and tell the hyperstrada to use led signals?
 
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Just went to the dealer. They checked the Ducati software-no led setting for the Hyperstrada 821. Also they recommended a 10w 3ohm resister. I’ll wire it up and let you know how it goes.

Learned some new stuff from the Ducati tech. On the Hyperstrada, the BBS controls the rear indicators and its resistance detection for the is very lenient. The front indicators however, are controlled by the dash, and its very anal about the amount of resistance needed.
 
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Pringles said:
I tried installing some resistors of unknown ohms in parallel and they didn't seem to work either. The resistors were some old ones that came from a rizoma turn signal kit.
Click to expand...

wiring the resistor in parallel with the LEDs will make the problem worse (decrease the resistance of the overall circuit), they need to be put in series to get the effect that you are looking for.
 
Lyndo said:
wiring the resistor in parallel with the LEDs will make the problem worse (decrease the resistance of the overall circuit), they need to be put in series to get the effect that you are looking for.
Click to expand...

Thank you. I wired in 3ohm resistors in series and it worked! 3ohms is enough to trick the computer
 
I have tried the SW motech resistor. This is with 18Ohm. Parellel.
Didn't do the trick.

The reaction is differtent. It blink 1 time normal length and then no more.
BEfore without a resistor it blinken several times before it stops.

I think the 18ohm is too small. The current is now to high. It was to low.

Where did you buy the 3 ohm resitor? Or what brand etc?
3ohm in serie, makes the current even less.

Or is the computer not measuring the currrent?
 
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Edwin71 said:
I have tried the SW motech resistor. This is with 18Ohm. Parellel.
Didn't do the trick.

The reaction is differtent. It blink 1 time normal length and then no more.
BEfore without a resistor it blinken several times before it stops.

I think the 18ohm is too small. The current is now to high. It was to low.

Where did you buy the 3 ohm resitor? Or what brand etc?
3ohm in serie, makes the current even less.

Or is the computer not measuring the currrent?
Click to expand...

I got the 3ohm resistor at the Ducati dealer.
 
Edwin71 said:
I have tried the SW motech resistor. This is with 18Ohm. Parellel.
Didn't do the trick.

The reaction is differtent. It blink 1 time normal length and then no more.
BEfore without a resistor it blinken several times before it stops.

I think the 18ohm is too small. The current is now to high. It was to low.

Where did you buy the 3 ohm resitor? Or what brand etc?
3ohm in serie, makes the current even less.

Or is the computer not measuring the currrent?
Click to expand...
I don't know the turn signal circuit of this bike in detail, so what I'm referring to below is my knowledge of general incandescent to LED swaps, if I am incorrect in any of it, feel free to correct me.

In a typical conversion, you want the resistor in series to bring the overall resistance of the circuit back to what it was with just the incandescent bulbs. The reason the LED's sometimes don't work properly when simply swapping bulbs is that the computer is looking for the resistance of an incandescent bulb. Since the resistance of the LED's are significantly less, the increase in current makes the computer think that there is a short in the circuit. By putting a resistor in series with the LEDs, you increase the overall resistance and lower the current in the circuit. Doing this makes the computer think that it is still operating an incandescent bulb. Putting a resistor in parallel will make things worse, no matter the size of resistor.
 
Hallo Hogbot,
I did the same 2 years ago and installed the led handgards from a hyperstrada 939. I wired in series 11 W and 15 Ohm resistors on each side and it works perfect. I calculated it with the Omic Formular, including 14 V from the Generator, 9,8 V and 3,2 W (led bulbs). In the rear I use led signals taken by the Ducati Panigale without resistors.
 
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I wonder if this changed on later models or if I just got lucky. I replaced my hand guards after the bike was knocked over a while back and used some LED indicators designed to work with my bark busters. I didn't wire in any resistors and haven't had any issues. Bike is a 2015.
 

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