I have a Lexus SC300 with an aftermarket HID kit installed that worked fine for about 18 months. Recently my area went through a rather rainy season where, within 2 weeks of each other, all four lights in my driver and passenger headlight compartment died.


This includes left and right HID aftermarket light bulbs, and left and right aftermarket LED corner/parking lights. However, I have never had any problem with standard halogen bulbs in the same setting. Also when I swapped the HID's in the harness for regular Halogens, the halogens worked fine. Finally, the inside of the HID bulbs looks a little foggy.


I assume a symptom may be that the headlight casings are leaking because there is always water condensation on the inside of the lenses.


To me, this seems overwhelming that the problem is in the bulbs, but people have told me that it's too big of a coincidence for both bulbs to burn out at the same time. The reason I am so confused, is because I am not rich, so I don't know how to best spend my money. New bulbs are $60. a diagnostic and repair is like $100 (unless i have to replace teh ballasts) and a whole new system is like $180. Does anyone have any thoughts on what the problem might me?



Answer:
Did you check any related fuses and relays , also check the grounds going to the bulbs , rain could of caused a short or the grounds to rust or it could cause bad connections so go over all the wiring and fuses especially the grounds.


Just keep in mind that the left and right low beams could have their own fuses and so could the hi beams and also there should be a main higher amp fuse that is for all the headlight system and it include the DRL running lights main feed too.


Hope that helps and best of luck.By the way don't just visually check the fuses test them by popping them out one by one and by using a ohms meter or test them in the circuit with the ignition in the run position, in fact I'd check all the fuses at both ends to be sure that it isn't a fuse.



Source(s):
Been fixing cars for many years now and one of my specialities is electrical trouble shooting so if you need anymore help or advice just ask.

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Ask : Is my Lexus sc300 lighting problem the bulbs, ballasts, or wiring?

I have a Lexus SC300 with an aftermarket HID kit installed that worked fine for about 18 months. Recently my area went through a rather rainy season where, within 2 weeks of each other, all four lights in my driver and passenger headlight compartment died.


This includes left and right HID aftermarket light bulbs, and left and right aftermarket LED corner/parking lights. However, I have never had any problem with standard halogen bulbs in the same setting. Also when I swapped the HID's in the harness for regular Halogens, the halogens worked fine. Finally, the inside of the HID bulbs looks a little foggy.


I assume a symptom may be that the headlight casings are leaking because there is always water condensation on the inside of the lenses.


To me, this seems overwhelming that the problem is in the bulbs, but people have told me that it's too big of a coincidence for both bulbs to burn out at the same time. The reason I am so confused, is because I am not rich, so I don't know how to best spend my money. New bulbs are $60. a diagnostic and repair is like $100 (unless i have to replace teh ballasts) and a whole new system is like $180. Does anyone have any thoughts on what the problem might me?



Answer:
Did you check any related fuses and relays , also check the grounds going to the bulbs , rain could of caused a short or the grounds to rust or it could cause bad connections so go over all the wiring and fuses especially the grounds.


Just keep in mind that the left and right low beams could have their own fuses and so could the hi beams and also there should be a main higher amp fuse that is for all the headlight system and it include the DRL running lights main feed too.


Hope that helps and best of luck.By the way don't just visually check the fuses test them by popping them out one by one and by using a ohms meter or test them in the circuit with the ignition in the run position, in fact I'd check all the fuses at both ends to be sure that it isn't a fuse.



Source(s):
Been fixing cars for many years now and one of my specialities is electrical trouble shooting so if you need anymore help or advice just ask.