JDM conversion with HID on a 98 CW ITR. Conversion was done by myself about 3 years ago and everything worked fine until about a month ago when my driver side light went out.
I thought it was the bulb, got that check out and it worked find on the passenger side. Then I thought it was the ballast but it wasn't that either. Checked all the fuses and they are all good. I'm thinking it's an electrical problem but I don't know where to start. Any suggestions?

 

fuse is fine?
Did you check the ballast? make sure your grounds are good

 

I had a very similar problem with my passenger side, what it ended up being was the fusebox itself. I discovered this by wiggling the fuse and the light turned back on, the connector on the fuse box was lose so I bent the prong on the fuse slightly to get a tighter fit and it has worked problem free since then.

I hope this actually helps