rgc wrote: ↑
Mon Sep 13, 2021 7:04 am
Thanks for the reply , daughters car she was driving to work this morning and texted me about headlight so didn't see it 1st hand, body shop just replaced that whole assembly 2 months ago so maybe the bulb just went bad.
They may have got finger-oil on the bulb during replacement and didn't clean it, that will cause them to fail quickly. You have to hit them with rubbing alcohol if you accidentally touch them, same for halogens. It's because the glass isn't really glass, it's crystal. There will be an obvious discoloration on it if that was the cause of failure. If it isn't the bulb, then they may have used a cheap aftermarket assembly with a crappy ballast. Unfortunately, because it's a high-voltage breakover circuit, there's no good way to test them except with a known-good bulb. If you don't want to buy one without knowing, spend the extra time and swap left and right. That will confirm whether the problem is the bulb or the ignitor/ballast.