Question about 2005 Lexus RX330
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
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Posted on Jan 02, 2017
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