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12V Dual intensity LED problem

Discussion in 'LEDs and Optoelectronics' started by Racso, Apr 14, 2011.

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  1. Racso

    Racso

    1
    0
    Apr 14, 2011
    Hi All
    I hope someone can help me out here. I am installing Dual intensity LED lights on my wife's motorcycle. When I tested them from a battery they work fine.
    Black=Ground
    Yellow = Running
    Blue = Brake
    I hooked up black and yellow and the light came on, I then added blue to positive and light got brighter. Good so far!
    When I hooked them up to the bike using the same colour combo I had no lights at all. If I swithced yellow and blue I would get runnung lights but nothing on the brake circut. I put a meter on the bike and found out that the running lights are at 12V (key on,not running) and the brake wire has .1 volt. I think that this .1 volt is screwing things up for me. Is there any way I can remove the .1 volt from the brake wire using a resistor,doide??? anything?
    The bike is Fuel Injected so I hope the computer doesn't need that .1 volt to work.

    I really don't know anything about electronics and have basic knowledge on wiring 12 Volt systems. If you can help please make the answer as simple as possible.
    Thanks Racso
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,449
    2,809
    Jan 21, 2010
    It sounds to me that your bike may be switching a ground rather than a +12V signal to the brake light.

    I wouldn't have thought that overly likely, but I'm no auto-electrician.
     
  3. jcurrie

    jcurrie

    128
    1
    Feb 22, 2011
    your right Steve all of the modern automotive brake circuits as do most of the other circuits are a groung interupt type .
    jim
     
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