Question about 2005 Lexus RX330

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2005 Lexus Rx330 Ballast problem??? First I saw my passenger side HID headlight was on and off and then mostly off. I thought the HID bulb burnt out. I bought a new one and replaced it. After I installed it, I turn the headlight on. The new bulb seem like not so bright and about 30 seconds later, it's completely off. So it's not the bulb that burnt out from beginning. My second thought was the ballast which bunt out. I called Lexus dealer and ask them if they carry ballast for my car. Surprised me that they said, they don't know what that is. They only know the wiring harness and the socket but not the ballast for HID bulb. Anyway, could you tell me what's wrong with my headlight and how to fix it. Thanks,

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Well, we seem to have a real dilema here. I just searched the service manual for your 2005 RX330 and I cannot find any reference to a ballast for the HID headlamp bulbs. According to the wiring diagram, they are wired to the Headlamp Control Relays in Junction Block #2. (Right-hand side of the engine compartment) These relays are "Solid State", so my guess is that the balast for the HID may be built in to them. These are controlled by the Body Control Module. I would recommend scanning the body control module for fault codes before doing anything else. The first step in the diagnostic chart for the headlamp system is to perform a diagnostic systems check. There is a symptom chart to follow if there are no codes present, but if there are codes in the system, you could be shooting yourself in the foot trying to follow the symptom chart without first correcting any fault codes. This is not your fathers headlamp system - it is equipped with tracking control and automatic headlamp leveling...VERY sophisticated. Also lots of stuff that can break...this is what I call JOB-SECURITY- - LOL!

Posted on Apr 08, 2011

  • davidthom847 Apr 18, 2011

    I think you've indirectly helped me with my '99 GS400. Like the earlier inquiry, the passenger side bulb finally went out (per the Toyota dealership, it WAS the bulb). So I got some brighter 8000K bulbs to replace both sides with. The result is that the new bulb went out after 30 seconds. I decided to at least match the new bulbs, so I also replaced the driver side bulb. Same thing; BOTH now go out after 30 sec. I guess the svc guys get more business from me.

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http://www.carsets.co.uk/upload/temp/images/hid-light-installation-photo-display.jpg

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I have a 2005 Lexus Rx330 with HID AFS headlight. My passenger side light went out. I thought the bulb burnt out, so I bought a new bulb. After replacing the new bulb, it happened exactly like my old bulb. It light up lightly and then total black out. What's wrong with it? I thought the ballast burnt. I called Lexus dealer and asked for the new ballast/transformer. Surprised me, they don't know what is it. They told me they only know the wiring harness and the socket, but not the ballast ??????? Could you tell me what do I need to replace?

Thanks,

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