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rear flashers with braking light?

Discussion in 'BNS12 Chat & Tech' started by RJVB, Dec 4, 2009.

  1. RJVB

    RJVB GT Reference

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    I often see an HD model on my way to work that has its taillight and braking light integrated in the rear flashers. I kind of like that, esthetically speaking but also for the increased visibility.
    Does something exist that can be mounted easily on our bikes? I don't think doubling the taillight would be needed, but an extra braking light would be very welcome.
     
  2. john zibell

    john zibell Moderator Staff Member GT Famiglia

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    Rene,

    He is probably using something like SOS Priority Lites.

    http://www.powersportsuperstore.com/Sou ... 7-4047.htm

    I've used them on airhead BMWs, but since you cut into the wiring harness, I don't know it it is compatible with the LED tail light system on the newer Guzzis. It may generate faults to the dashboard.
     
  3. RJVB

    RJVB GT Reference

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    The flashers on that Harley in fact look like they're stock, or were specifically designed for HD. The link you gave just shows a little box presumably holding some electronics, is that right?

    I guess it ought to be possible to split off the power to the brake lights — people have hooked up the light unit of Givi topcases I presume?
     
  4. Bisbonian

    Bisbonian Cruisin' Guzzisti

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    They are stock on a lot of the new H-D's, they started out on the Nightster and have caught on so they're on some of the other models as well.

    Sorry, I have no idea how to make it work, although I think I recently read a magazine article which may have mentioned it; I'll see if I can find it.
     
  5. john zibell

    john zibell Moderator Staff Member GT Famiglia

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    The little box contains electronics. All the brake tail, and turn signal inputs from the bike go to it, then the box sends it to the tail light and turn signals.
     
  6. seb

    seb Tuned and Synch'ed

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    Here is some information that may be of some interest to people who are contemplating screwing around with the MG LED tail-lights. I have installed a Rostra electronic cruise control on my 2007 Norge and I am currently in the process of fine tuning it before I write the article on how to do it. One of the problems with after-market cruise controls and modern electronics is the LED tail light. Cruise controllers want to dis-engage the unit when the brake light is engaged. This doesn't mean applying 12 volts to the brake circuit, it means applying any voltage to that line. I could not get the cruise control to engage and I suspected that the LED light was the problem. The normal trick is to put a 12 volt relay on the brake circuit and switch the cruise control dis-engage to ground when the brake is de-activated. In the past, the dis-engage line read zero voltage through the filament of the conventional lamp. LED's don't do that so you need a relay. Imagine my surprise when I installed a relay on the brake line wire going to the LED's and when I released the brake lever, the relay stayed engaged. Testing revealed that the brake line had zero volts on it when the ignition was switched on. Applying either brake lever produced 12+ volts on the line but when the lever was released, there was still 6.5 volts on the line. This was enough to keep the relay engaged. I have yet to figure out where this voltage is coming from. The solution to my problem was installing a 12 ohm 50 watt resistor on the brake line. This looks like a conventional tail light lamp to the elecrical system and dissipates any residual voltage when the lever is released and drops the relay out. In turn this gives a true zero voltage to the cruise control dis-engage line so the unit can be engaged. Anything connected to the brake circuit is going to have to contend with residual voltage or at least have enough of a load to switch properly.
     
  7. Holt

    Holt High Miler GT Contributor

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    René;

    You better check with the automotive inspection authorities, whatever they're named in France. It may not be legal to fiddle with the OEM setup, as it's a part of the CoC.
     
  8. Brian UK

    Brian UK GT Reference

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    I was going to say that too. Certainly in the UK, a flashing rear or brake light would be illegal. A guaranteed pull by the police.

    Seb,that 6 volts you see on the brake light feed is actually coming back out of the light unit. It seems to be fed back from the tail light. Something to do with the way the stop/tail LEDs are connected.
     
  9. RJVB

    RJVB GT Reference

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    Erm, French legislation says a vehicle (or bike, can't remember now) can have one or two tail/brake lights. In short, I know it's slightly risky, but as long as there's nothing flashing and it's just my turn signals which light up in *red* when I activate the brake, in addition to my regular brake light, I don't think a lot of LEOs will tilt on that.
     
  10. ncassidy

    ncassidy Cruisin' Guzzisti

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    A friend of mine has a harley with the blinking brake light. It is rather bright and very visible. It looks like a stock setup, he purchased it somewhere in Florida. I believe he replaced the tail light with the flashing one. Now I am not sure if there is a retrofit unit that could be installed onto the guzzi system, I kind of have my doubts about it. I will try to find out what and where he bought the unit.
     
  11. ncassidy

    ncassidy Cruisin' Guzzisti

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  12. draidt

    draidt GT Reference GT Contributor

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    The 6.5 volts is normal and it is used for the tail light running lights, You will need some type of zenier diode in the circuit that will only flow 12 volts one way and will not flow the 6 volts to the cruise control circuit.

    Here's a link to WildGuzzi, where Zoom Zoom (John Henry) pioneered one on his Norge.

    http://wildguzzi.com/forum/index.php?topic=17902.0
     
  13. Cat City Rider

    Cat City Rider Cruisin' Guzzisti

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    I split off from the brake light for a Givi topcase with no trouble at all. With my single light an only option I had to make the decision of using the light for a running light or a brake light but not both. I went with the brake light.
     
  14. RJVB

    RJVB GT Reference

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    Thx, Brian!! Noel: I only see taillights on the site you linked to?!
     
  15. Cat City Rider

    Cat City Rider Cruisin' Guzzisti

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    Rene, Let me know if you need more info, such as which color wire, and where. I'll go and look for you. The wiring/light kit comes with everything you need but the directions are pretty minimal as I recall.
     
  16. RJVB

    RJVB GT Reference

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    Thanks ... for the moment I'm at 500km from my bike, for a traditional(ly) white xmas
     
  17. jdgretz

    jdgretz Cruisin' Guzzisti GT Contributor

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    Have you looked at the stuff from Signal Dynamics? The BackOff-XP looks good - I've got one on order to try on the Norge. There are a couple of other products that I like the looks of, like the WIg Wag and Brake Hold. http://www.pashnit.com/product/signal_dynamics.html

    jdg
     
  18. xenarchi

    xenarchi Cruisin' Guzzisti

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    I used theBack Off Module on my Yami for ages. LED brake light as well. worked fine. not sure how the MG will handle it though. Should be the same?
     
  19. Saint Nut

    Saint Nut Tuned and Synch'ed

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    New member. First post. Used Norge coming on a truck from Arizona sometime in next few weeks. My first MG.

    I like the looks of those products from Signal Dynamics. Just locate the turn signal and brake wires and splice the unit in.

    Another option, a little more spendy, is the old "Signal Minder" unit from Kisan that automatically turns off your turn signals after a user-selectable duration. That unit was recently updated to allow running light/brake light functionality to the turn signals. The reason it costs more is because there's no cutting, splicing or soldering. You simply unplug the OEM flasher relay and replace it with the Kisan.

    I don't know which if any of their models will fit the Norge. I've looked through the Parts Manual and the Service Manual and can't find the signal relay. Can anybody tell me where it's located?
     
  20. john zibell

    john zibell Moderator Staff Member GT Famiglia

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    I don't think I'd try to use these. Your tail/brake unit is LED and your turn signals are controlled by the dash unit electronically. No common 12 volt flasher in the system like in the old days.
     

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