Airhead LED pr0n

Discussion in 'Airheads' started by ignatz72, Dec 19, 2011.

  1. ignatz72

    ignatz72 call me iggy

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    Red lens requirements are State/County specific, so to be safe you should stick with Red in the Rear (that doesn't sound good does it?).

    I went with red in back just because I didn't want to possibly be at the mercy of whichever township's finest who had a bad day and really wants to issue that ticket...

    But Bill, I think white bulbs will be fine, although I do love how rich the amber light is in my front signals. Without a luminosity/color gauge to quantify, I think it's mostly academic though.

    Hell, clear incandescents worked fine until some idiot started a thread about LEDs! :D
  2. darklight79

    darklight79 drink it , ride it , nail it

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    Get the red superbright led for rear turn signals the red looks and work great through the yellow lense ...50 bucks boom done dont even think about it its the only fix
  3. Stan_R80/7

    Stan_R80/7 Beastly Gnarly

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    When I inquired about the signalminder for my airhead, I got this response:

    ====================================================================================
    SM-1 signalMinder replaces the Hella stock relay of the airhead.

    https://www.kisantech.com/view_product.php?product=SM-1

    If you replace all (4) turn signals to LEDs, you will also have to replace the single dash indicator idiot bulb to a 12V LED. Also, hooking up the Running Light option is recommended.
    =====================================================================================

    The running lights option is very nice with all LED turn signals. So, the turn signal instrument light is replaced by a LED. Once that is done the black/white wire is somehow attached to the relay - is that in the instructions somewhere?
  4. craydds

    craydds Long timer

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    No... on the LED instrument cluster bulb. One must use an incandescent (stock BMW) bulb. You need a bulb with some resistance to prevent "cross talk" between the right and left sides when connecting the running light option. I will have to review more info on what one does with the black/white wire, or perhaps ignatz knows the facts.
  5. ignatz72

    ignatz72 call me iggy

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    D'oh, sorry no, I have no experience w/ the SM-1, only the SM-6.

    I was hoping you knew this one craydds! I thought you had an SM-1 but didn't use some of the connections...

    In any case, I'll try to dig up my manual and see what's what w/ the SM-1.
  6. craydds

    craydds Long timer

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    Seems to me one would connect (pigtail) the black/white (power to the instrument cluster light) with the green/yellow (power to the turn signal switch). I did not connect my black/white because I have an Acewell (no stock instrument cluster). So, if you have an SM-1, connect the black/white to the green/yellow at the common terminal on the SM-1, it should work. (if blue smoke is emitted, disavow this message)
  7. Stan_R80/7

    Stan_R80/7 Beastly Gnarly

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    I don't think hooking the black/white (indicator bulb) wire to the green/yellow (power to the turn switch) will do the trick. Hooking up the switch to the bulb will light the indicator bulb when the switch is pressed - but the bulb will not flash with the turn lights. I have been lurking and reading the installation instructions for the SM-1 for some time, and the instrument indicator bulb needs to be driven from the flasher relay. This may be a question for the Kasan tech folks.

    However, your description and pics helped explain all the other SM-1 connections for my old airhead. Thanks!
  8. Bill Harris

    Bill Harris Confirmed Curmudgeon

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    Here is the problem. The light from the White LEDs is not the same as the white light from an incandescent. An LED-- whether it be yellow, red, or green-- puts put almost pure light of that color. Look at them as sloppy lasers. A White LED uses smoke and mirrors. It puts out Red, Green and Blue light and mixes in specific proportions to create light that is perceived as white to the eyes.

    --Bill
  9. craydds

    craydds Long timer

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    Yes, give Andy a call.
  10. craydds

    craydds Long timer

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    The green/yellow from the flasher relay makes the turn signals flash, it is the power to the signal bulbs, routed to left or right by the turn signal switch; think of the green/yellow as on-off-on-off power or "flashing". On the Hella relay there is a connection for the green/yellow and another for the black/white; they both send the "flashing" power. The black/white wire goes directly to the turn signal inicator bulb (instrument cluster). The SM-1 only has one "flashing" power out-put connection (discounting the running lights/brake flashing connections) for the turn signals to which one connects the green/yellow. This same connection should also power the indicator bulb causing it to flash with the turn signals. One could do a simple test - connect the black/white to the green/yellow at the SM-1 terminal and give it a try.
  11. Stan_R80/7

    Stan_R80/7 Beastly Gnarly

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    Ok, thanks for the additional clarification. I get it now. The Hella turn signal relay has a turn signal indicator bulb connection for fast flashing when a turn signal bulb is burnt out. Connecting the black/white to the green/yellow should make the indicator bulb operate normally.

    I was reading the instructions about momentary switches, then misread the wiring diagram and got confused. On an airhead, the turn signal switch must be kept in place for however long the flasher is flashing. I don't think it makes any difference if an LED is used in place of the standard indicator bulb.

    Edit: well... maybe not, based on the expanded explanation below.
  12. craydds

    craydds Long timer

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    If you have a different model signalMider (not an SM-1) you will need to call Andy at Kisan. Your understanding of the SM-1 function is basically correct, but think about it this way - green/black is positive power to the relay, brown is ground, green/yellow is positive power output FROM the relay to the bulbs. If you connected the green/yellow directly to a bulb and grounded the bulb (closed the circuit), the bulb would flash. This is the function of the turn signal switch, it closes (or completes) the circuit to the bulb, it sends the power from the green/yellow to the bulb. When the SM-1 "senses" the closed circuit it sends the "flashing" power out to the green yellow wire. Clear as mud? Study your wiring diagram so you understand the turn signal circuits. Now to the black/white wire - if you connected the black/white to the SM-1 power OUT-PUT terminal (the green/yellow terminal) then it would cause the signal indicator bulb to flash; but this is the problem, there is no way to turn it off, it would always be flashing, because it is always a closed circuit. So, I see your point. Tying the black/white to the green/yellow will not work. Here is a way around the turn signal relay - if you connected the black/white to a turn signal wire (blue/red or blue/black) the indicator bulb would flash with the signal bulb. So, from the circuit board in the headlight bucket, run wires with a diode inline from the blue/red and from the blue/ black, and tie both of them to the black/white. Clear as mud? If you connected the black/white only to one side (blue/red) then the indicator would only flash when that one side was flashing. If you connect a blue/red and a blue/black to the black/white WITHOUT diodes inline then the both right and left turn signals would flash at the same time. Can I make it any more confusing?
  13. craydds

    craydds Long timer

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    Here is another way to think about bypassing the relay for the turn indicator bulb. I have an Acewell with separate indicator bulbs for right and left turn. I connected wires directly from the blue/red to the Acewell left indicator and from the blue/black directly to the right. You could wire up separate indicator bulbs to flash with the right and left turn. Or, you can dispense with the flash indicator bulb, do not connect the black/white wire, simply do without as it is not necessary for function.
  14. craydds

    craydds Long timer

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    You can connect two wires - one from the blue/red and one from the blue/black - to the black/white indicator wire. Only one of the wires - like, the wire from the blue/red - would have to have a diode in-line; this will prevent the flow of current from the blue/black side to the blue /red side. I think, just to be safe, I would put a diode in each line. Now your indicator bulb will flash when the right or left turn signals flashes. Many things are so simple, but, with extra effort, we can make them very complex.
  15. Stan_R80/7

    Stan_R80/7 Beastly Gnarly

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    Yes, I see what you are saying. I think having leads from the black/white wire spliced into the turn signal wires with a diode on each side (allowing current to the indicator bulb) is a fix. I don't want to remove the indicator - the bike is too old to trust the electrical system without an indicator. But,I think there may still be some indicator light glow as mentioned in the instructions when using diodes. This is a bit of a head scratcher and one of the reasons I wanted to understand a bit about what the relay does.

    Another option is adding two relays (one for each side) that energize the indicator bulb when each side flashes. That may stop the indicator light glow described in the instructions by isolating the left and right flasher wiring. Other than finding room for the relays, they aren't expensive or difficult to wire.

    Ok. I need more time to think of a more complex solution. Damn, I thought this might be simple. I thought the relay may operate on a change in the resistance, instead of current flow. But, the simpler approach of starting a timer when current flows is better. Simpler is always better.
  16. craydds

    craydds Long timer

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    The signalMinder is pretty cool, gives you running lights and flashing brake lights, too. It is worth all the effort. Call Andy at Kisan - he may have dealt with this and have a SIMPLE solution.
  17. craydds

    craydds Long timer

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    Let me know if you need any help. Together, we could work out the most complicated scheme possible.
  18. Bill Harris

    Bill Harris Confirmed Curmudgeon

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    I did some testing and determined that once the blue component of a white LED was filtered out with a amber (yellow) lens, the brighter white light was reduced ot the intensity of an amber LED.

    So I got a pair of Custom Dynamics Amber LED clusters to replace the 1157 bulbs in the front turn signals.

    http://www.customdynamics.com/motorcycle_led_bulbs.htm

    Those suckas are BRIGHT! I did a temporary hookup to 12v and looking at the cluster for a moment left purple spots in front of my eyes for a couple of minutes.

    --Bill
  19. craydds

    craydds Long timer

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    Me likie! Do you think they are brighter than the superbrightled's brand? Is there an objective brightness measurement for comparison?
  20. Bill Harris

    Bill Harris Confirmed Curmudgeon

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    They are different lamps and there isn't a direct comparison, IMO. The Genesis clusters are flat arrays of many 5mm (T5) LEDs and many of the SB_LEDs are bulb replacements using LEDs in a surface-mount package (fewer LEDs of higher individual output). The Genesis are available with a bulb-base, but with their larger size they can't always directly replace the bulbs.

    I went with the 1.8" dia flat array because the turn signals in the Hannigan were sorta factory-adapted from existing UJM turnsignal lenses without reflectors. I tried to adapt a UJM w/reflector but without a reflector to direct and focus the light from the filament a lot is lost and the results were so-so. In an LED the package focuses and directs the light output and with 48 high-output LEDs it's bright. I got the Genesis array with wires (no base) and I hardwired them into the fairing.

    THey work well and the SB_LEDs work as well, just different details.

    I'll do photos and all and put comments in my "Hannigan Lighting" thread later on. Meanwhile, on a rainy Christmas day, I'm kicking back and chilling...

    --Bill