93-97 Firebird Bi-Xenon FX Projector Retro-fit ***UPDATED W/ WRITE-UP***
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What's the amperage rating of the diode and how is it wired? I'm assuming the side without the stripe is grounded.
Copy & Paste Moderator
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From: Eastern MA
In a dual filament bulb system, when high beam is activated, power is cut to the low beam. Therefore, only one filament is lit at any given time. This harness will keep power to both low and high when high is activated because the high and low are bridged with the diode. This diode's orientation only allows the power to flow from high beam to low beam so when the low beams are activated, power can't back flow to the high beam. This keeps the HID system powered regardless of whether the low beam or high beam is active and when the high beam is active the bi-xenon shutter in the projector is moved to allow the projector to produce a high beam pattern.
Last edited by VIP1; Aug 15, 2009 at 03:40 PM.
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Verdad Gallardo TECH Regular
Joined: Feb 2005
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TECH Regular
Joined: Feb 2005
Posts: 400
Likes: 2
Looking at the diagram, both sides are positive. In the diagram, Yellow is high beam, blue is low beam. I'm guessing the stripe indicates direction. A diode only allows power to flow in one direction (basically, it prevents back-flow).
In a dual filament bulb system, when high beam is activated, power is cut to the low beam. Therefore, only one filament is lit at any given time. This harness will keep power to both low and high when high is activated because the high and low are bridged with the diode. This diode's orientation only allows the power to flow from high beam to low beam so when the low beams are activated, power can't back flow to the high beam. This keeps the HID system powered regardless of whether the low beam or high beam is active and when the high beam is active the bi-xenon shutter in the projector is moved to allow the projector to produce a high beam pattern.
In a dual filament bulb system, when high beam is activated, power is cut to the low beam. Therefore, only one filament is lit at any given time. This harness will keep power to both low and high when high is activated because the high and low are bridged with the diode. This diode's orientation only allows the power to flow from high beam to low beam so when the low beams are activated, power can't back flow to the high beam. This keeps the HID system powered regardless of whether the low beam or high beam is active and when the high beam is active the bi-xenon shutter in the projector is moved to allow the projector to produce a high beam pattern.
Copy & Paste Moderator
Joined: Apr 2002
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From: Eastern MA
You can get a cheap D2S HID kit from DDM Tuning for $85. I say "cheap" because they are reproduction bulbs and not OEM bulbs like Phillips or Hella which cost more and are better quality.
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Copy & Paste Moderator
Joined: Apr 2002
Posts: 9,764
Likes: 208
From: Eastern MA
Are they real electroplate chrome or the other kind (hydroform I think)? Real electroplate chrome can handle more heat than the other kind. Also, from what I remember, e46 projectors are quite open so its less of an issue, but still something for concern.
TECH Regular
Joined: Feb 2005
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I plan on using the H7 halogens temporarily only, until I get some moola set aside for a cheap HID kit. I don't do long night drives anyway, no more than 30 minutes at a stretch, so hopefully heat shouldn't be much of an issue. FWIW, I've used 120w H3 halogen bulbs in cheap Chinese driving lights for hours on end in an offroad vehicle and never once had any problems with damage to the reflectors, lenses or wiring. I hope these Bosch projectors are better built :p
