replaced low beam on my 2007 is250 and light still will not work

 

Halogen or HID? If HID, swap the bulb to the other side and if it lights, ballast is bad.

 

I'm having headlight issues as well. I've got HID aftermarket lights and I did the swap to try and determine if it was bulb or ballast. unfortunately now I have no lights either side (put them back to original). I've checked the fuses that I have been able to locate and they're all good so far. One left that I'm trying to get clarification on in a thread I'm going to post.

Anyhow, just sharing my experience (normally I do the swap testing without situation getting worse).

Good luck.
J