Hid Bulb Is Out

[cphomm]

Hello Everyone!,

I'm newbie to this forum. this is a great place to visit if your looking for all things Lexus. I was wondering if someone can help. I had a factory bulb go out on me (h2r) and it has been replaced with upgraded to 8000k bulbs on both sides. However, the side where i thought the bulb had burnt out apparently wasn't, i was told it could be the relay switch. But if the relay switch is bad then the other side wouldn't be working also right. what would be the issue? thanks.

[bartkat]

Could be the ballast. There's one under each headlight. The HID bulbs in the low beams are D2R

[cphomm]

Could be the ballast. There's one under each headlight. The HID bulbs in the low beams are D2R

it very well could be. how would i check or test that? i was afraid it could be internal wiring. but the ballast would make the most sense because wiring doesn't really go bad. but the ballast would be the most logical. i did mean to put D2R. they are bixenon right? what are the bulb size in the fogs? thanks.

[bartkat]

IS300 is not bixenon, just xenon for reflector housings.

I dunno how to test the ballast but if you swap bulbs from the other side and it doesn't flash blue and then light up, it's probably the ballast.