The driver's side headlight on my 05 RL is out, I've replaced the HID xenon bulb and it still doesn't turn on. I'm going to see if the ballast might've become unplugged, but does anyone know of any other common or potential troubleshooting possibilities that I'd be able to look into while I'm working on it? Any ideas of what might be causing it or links to previous threads are appreciated.

Thank you in advance!

 

ballast and igniter are the next culprits, you can swap parts from left to right to rule it out