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Integrated LED Tail Light Install (Need Help)

This is a discussion on Integrated LED Tail Light Install (Need Help) within the ZR-7 Accessories forums, part of the Kawasaki ZR-7 category; ok uh...let me try and rephrase this does the casing of the light unit you have need grounded?....if its 100% plastic the answer is no....meaning ...

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Thread: Integrated LED Tail Light Install (Need Help)

  1. #16
    Supreme Being sh0rtlife's Avatar
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    ok uh...let me try and rephrase this

    does the casing of the light unit you have need grounded?....if its 100% plastic the answer is no....meaning you have a 2 wire.. 1 goes to ground the otehr to signal..and you will NOT have marker up front on the sides.....mine is a single wire...to which the case grounds and the other wire goes to turn

    obo its simple...there is 2 types of 2 wire.....both depend on the bulb and case design.....1 is a "case ground" where the case is the ground wire 1 wire runs turn the other runs marker IE a 2 filiment bulb or led aray...the OTHER type of 2 wire is non grounded case singile filiment bulb 1 wire grounds the bulb the other wire does a function in this case turn sifnal and NO markers


    i should also add this ....
    LED's are "single directional flow of power"....this is slightly more complicated to explaine...but if you have a normal bulb in hand..you can power the caseing or the end and ground the other..it will work both ways it does not care......an LED is like a 1 way street...it will NOT function if you try and power the wrong side and ground the other..it just wont do anything...but it wont burn out from this either

    i see in the diagram you have green and purple....do you know for FACT that these are what your saying they are?...or are you guessing?...do you have the casing of the unit grounded?...if the case needs grounded and you dont have it grounded it can cause all of these issues..if the wires are actualy just "power" and "ground" it too will cause all of these issues with how youve wired it up..unless youve made 100% sure your positive side is going to the turn signal and the ground side is going to the ground wire

  2. #17
    Obo
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    I know LED's are polarity dependent. It is a diode after all.

    I guess what was throwing me is when you guys were saying 2 wire I was thinking signal and park light and no ground (be it a wire OR chassis ground) To me, case ground is still a 3 wire system, even if it has 2 wires lol.

    Sorry I simply misunderstood. My brain is almost full I think.
    2004 Kawasaki ZR-7S
    complete with extra "stuff"

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  3. #18
    Supreme Being sh0rtlife's Avatar
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    its ok alof of ppl do that..thats why i broke it down to each type to help make it make sense....personaly i see it the same way i dont count ground wire in my amount of wires..but when it comes to those who dont understand "automotive" wireing youve gotta count the actual wires that are visable and explain the grounded chassis thing

    a buddy of mine who does tech wired up trailer lights on a trailer he got..he had turn signals and nothing else and had no idea why.....2 wires off the lites(not knowing the chassis ground on them)..ran ground wire to one side and turn to the other and wondered why it all didnt work....so i litteraly just re explained all this stuff last week

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  5. #19
    Newbie FullBit's Avatar
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    Well based on what you said, there is one option I did not try, the housing for the front turn signals uses a rubber bushing that would prevent the exposed metal from contacting the bike in any meaningful way. I could try running the two wires marker-to-marker and signal-to-signal and a loose piece of wire grounding the frame to metal or try hooking them up again like the last attempt and hope the fuse doesnt blow, it worked properly this way until it popped the 10a fuse... For being damn near finished with a hardware engineering degree this is embarrassing. As a side note, I am sure about the iwres functions after trial and error.

    -2000 Kawasaki ZR-7-
    All-In-One Clear LED Tail Light, HID Conversion, Blue LED Gauges
    -1991 Suzuki GSX-F 600 Katana-
    SOLD

  6. #20
    Obo
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    blown fuse = not wired correct
    2004 Kawasaki ZR-7S
    complete with extra "stuff"

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  7. #21
    Supreme Being sh0rtlife's Avatar
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    and if i read that diagram..youve got marker going to ground......

    do me a favor...pull the unit...pull the seat....connect a wire to the body of the light(aka assumed ground)......now touch that wire to neg on the battery and pick one of the 2 other wirse and touch it to the pos side of teh battery...?does it light?..if yes good....if no ive got bad news for you.....next take the OTHER wire in hand and touch it to the pos side of the battery (the first wire should be touching NOTHING)...does it light?..

    if both lit..one should be "dim" the other should be bright(turn is bright mark is dim)...in which case wire the dim one to marker the bright one to turn and run the bike ground out to the caseing of the unit

    if you got zero light....try touching just the pair of wires to the battery (without grounding the case) if nothing then try them the other way on the battery..if you get something and didnt in the previous test then you have a simple 2 wire....which means..connect the positive wire(if the light lit up 1 way but not the other this is the light positive) to turnsignal and then connect the other wire to bike ground

    this will sort things out

  8. #22
    Newbie FullBit's Avatar
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    EDIT:

    I re-did the wiring and I lied... I guess I did not get the LED signal's wiring right right
    I took the LED's apart and looked at the mother board, one wire in fact had a label of "GND" so I am an idiot LOL!!
    No Markers anymore but everything is working great now and looks super clean! Whole bike is finally LED!

    I did some more to her too (cosmetically) Painted the Exhaust with high temp "barbeque" flat black to match the whole blue up top black on bottom aesthetic and also painted the "gray-ish-blue" fairings under the seat gloss black, looks 10x better IMHO! Next is I am thinking of Plasti Dipping my bike and wheels.
    Last edited by FullBit; 05-01-14 at 12:00 AM.
    -2000 Kawasaki ZR-7-
    All-In-One Clear LED Tail Light, HID Conversion, Blue LED Gauges
    -1991 Suzuki GSX-F 600 Katana-
    SOLD

  9. #23
    Obo
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    You might want to check if you need side marker lights up front by law.
    I know they are also useful to vehicles coming at you to see you are a motorcycle and not a padiddle.
    2004 Kawasaki ZR-7S
    complete with extra "stuff"

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  10. #24
    Supreme Being sh0rtlife's Avatar
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    i figured one wire was ground....not many led units have a built in marker

    now if you wanted to ADD a marker you could add something dimmer to the inside of the unit using the same ground but adding a power wire for it

  11. #25
    Obo
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    Quote Originally Posted by sh0rtlife View Post
    i figured one wire was ground....not many led units have a built in marker

    now if you wanted to ADD a marker you could add something dimmer to the inside of the unit using the same ground but adding a power wire for it
    Or 2 diodes and a resistor in a Y. Run the marker to the resistor side and the turn to the non resistor.

    Like this crude drawing:

    signal marker LED.png
    2004 Kawasaki ZR-7S
    complete with extra "stuff"

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  12. #26
    Newbie FullBit's Avatar
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    Ok just to make sure i am following correctly. Put a resistor on the bike side marker wire and splice it in to the turnsignal connection?
    -2000 Kawasaki ZR-7-
    All-In-One Clear LED Tail Light, HID Conversion, Blue LED Gauges
    -1991 Suzuki GSX-F 600 Katana-
    SOLD

  13. #27
    Supreme Being sh0rtlife's Avatar
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    yup...but i think you need a 1way diod in there too......the resistor is to drop the voltage a bit for "dimmer" useage..thing is voltage will go both ways thru it and run all sorts of havoc without something to make the power only go 1 way..to which i think youd actualy have to have 1 way diods on both sides

  14. #28
    Obo
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    Yes, the zigzag line on the diagram is the resistor on the marker light side. I can't give you an exact load rating for it as I don't know what to use.

    The triangles with line are diodes. Think of the diode as a one way gate. It allows the power to go thru one way only. That way no power from either the marker or the signal circuit feeds back into the other.

    The purpose of the resistor is to drop the voltage to the LED making it dimmer. When the turn signal is activated the LED gets full power and is brighter. This gives the illusion of 2 bulbs from one light.

    As per my diagram and Shortlife's comments, you need BOTH diodes and the resistor for this to work.
    2004 Kawasaki ZR-7S
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  15. #29
    Obo
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    Like this:

    Attachment 75683
    2004 Kawasaki ZR-7S
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  16. #30
    Obo
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    Here's a webpage with details. They use it for a rear light but the process is the same for a marker/signal.

    Dual Circuit Element « Bareass Choppers Motorcycle Tech Pages
    2004 Kawasaki ZR-7S
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