The striped wires are for the front running lights and are only needed if these are to be used, the origional front lights used a twin fillament bulb, so there was effectively 2 seperate circuits. Another thing to remember is the LED's are polarity sensitive, whereas a standard bulb isn't, LED's will only work if they are connected positive to positive and earth to earth unlike a standard bulb which will work both ways. I'm pretty certain that the origionals are earthed through the frame, not the harness, my 650z was anyway (I fixed that). You need to hook one wire into the solid orange or blue depending on which side, and one wire to ground, ignore the striped wires, if you want to run front running lights then you will need a set of lights on the front with 2 seperate circuits. If you run both the striped and solid wires to the front signals then it will cause issues. LED's are much more sensitive to bad connections and stray currents than conventional bulbs.
