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whitecayman

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About whitecayman

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  • 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, the
  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
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