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About whitecayman

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Profile Fields

  • From
    Alberta, Canada
  • Porsche Club
    PCA (Porsche Club of America)
  • Present cars
    2005 Boxster
    2006 Legacy
  • Future cars
    Evo, Cayman, Legacy GT STI
  • Former cars
    WRX, CLK500, GSXR1000, CBX, 323i
  1. Wow, first post and an excellent one at that! Welcome to the forum as well. After some discussions with the gang at work yesterday we thought that this might be the case as well. The voltage as measured with a multimeter was consistant with the battery voltage ~ 14.4v with the engine on. With regards to the relay, when the DRL was active the frequency of the buzz was lower then it was with the headlight switch on. My plan today was to bring home the scope to "see" what the voltage actually looked like. Your hypothesis about a square wave makes sense, quite the solution for DRL's but hey, these cars are quite advanced in many ways. What I was thinking was designing a circuit that could sense (read) this voltage and trigger a switch that activates the HID ballasts. It might even be possible to descriminate between the low duty cycle signal and the full on duty cycle and keep the headlights off thereby keeping the headlight off until the headlight switch is moved to the full on position. So, assuming that your ID is the same as you ride and you don't have factory HID, you would be in the same boat as I am should you be considering a DIY upgrade... Some brain storming could be in order :thumbup: WC - thx for the welcome! Tell me what you see when you scope the signal. Btw, whitecayman is close but not exact - I've got a '05 Boxster, no HID's - I picked whitecayman as I was toying with getting one when I signed up. Instead of trading I'm now just thinking of tinkering with the ragtop, adding wheels, HID's, lowering it a bit, etc. I've thrown too many dollars at trading cars the last few years and decided I'll probably have just as much fun tinkering with it - cheaper too! It is such a fun car so why not keep it? More power, etc seems to just get me in more trouble..... I like your idea of using the original signal as a trigger. If the square wave theory is right then just bypassing it would probably bring a 'headlight out' warning or something - seems the factories want to warn of us everything! Keep me posted on the HID's! Good luck...
  2. WC - from scanning some other forums, the Porsche system may be using electronic switching which may not put out a nice straight DC output. For instance, the circuitry may put out a low voltage square wave when running the DRL's and switch to a higher voltage, but still running a square wave of the same duration, or increase the duty cycle of the square wave, to produce the required higher light output for the full strenght headlight. In either case, the HID's see a square wave and are therefore getting turned on and off many times/sec and don't like this as it extinguishes the arc but doesn't allow enough time to reignite. Bottom line is to find that electronic box and bypass it. I'd be surprised if one of the mfr's or dealers of HID's haven't come across this problem before. Hope this helps in your search for an answer - I'm intrigued by this too and will follow up more and publish a more definitive answer if I find it.............The square wave scenario might be consistent with the inability to trigger the relay also.........
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