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12v led turnsignals

Discussion in 'Automotive Electronics' started by d8ain25, Nov 20, 2015.

  1. d8ain25

    d8ain25 New Member

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    Hello,

    I searched around the forum, and didn't find anything that would help me with a project that I have going on.

    I purchased some LED strips that I am going to install on my car. The issue is that they are dual color, white and amber. The white is a running light, and then the amber is the flasher part. If I just hook up these strips, and use the turn signal, it will flash white, amber, white, amber... What I am trying to do is turn off the white while the amber flashes, then allowing the white to turn back on after the signaling stops.

    I have a relay that I was going to use, but it doesn't quite do the job. I am trying to figure out a way to have a capacitor or something over the input for the relay that will keep the relay triggered as long as there is a momentary signal from the turn signal. I already have load resistors attached from a previous set of signals, but I wanted to mount it correctly this time.

    Any ideas?
     
  2. Ian Rogers

    Ian Rogers Super Moderator Most Helpful Member

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    Depending on the car, if you have a bulb failure system,,, It will fail!!
     
  3. d8ain25

    d8ain25 New Member

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    The bulb failure system only hyperflashes when the system thinks that a bulb is out. I have load resistors already to avoid that.

    The car that I am working on is a 2007 chevy impala.
     
  4. dave

    Dave New Member

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  5. Ian Rogers

    Ian Rogers Super Moderator Most Helpful Member

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    On that side of the pond, are the indicators doubled up with the brake lights???
     
  6. d8ain25

    d8ain25 New Member

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    The brake lights are also the indicators on this vehicle.

    My idea was to just tap into the existing circuitry for the front indicators, and replace them with the led bars that I have. I wouldn't be altering the actual wiring of the vehicle, just using the existing wiring to power the lights. The only issue that I am having is that I can't figure out how to basically latch the relay until the signal stops.
     
  7. Ian Rogers

    Ian Rogers Super Moderator Most Helpful Member

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    Remember... The turn indication system on the VW uses the bulb to earth the warning dash bulb ( that's why they flash alternately ).. Maybe you could do something that way!! ( Are they are the reversible powered ones, not the three legged ones? )

    There must be people on the net who have done this.. Maybe piggy back onto their design....

    I could do this dead easy with a micro!!
     
  8. d8ain25

    d8ain25 New Member

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    There are three wires on the string. One for ground, one to power white, and one to power amber.

    I would think that throwing a capacitor on the power for the relay would work, but I am not sure. I figured I would seek assistance before I started throwing parts at the problem.
     
  9. shokjok

    shokjok Member

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    Am I understanding this request as being these LED strips' output color is dependent upon voltage polarity? If not, then flashing each color separately is better than a circuit re-design.
     
  10. Diver300

    Diver300 Well-Known Member

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    There is an earth wire on the LED strips, and two power feeds. One feed lights them white, the other orange.
     

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