I bought this S2000 AP1 with a AP2 headlights conversion.
It's been fine for past 10 years.

My left HID bulb doesn't come on one day. I changed the bulb and fuse and put everything back. It worked for a short time and the fuse blown again.
My DRL fuse was blown, so I replaced it. Low beam doesn't work. When I pull the high beam, I can hear the DRL fuse blown.

Any ideas what's going on?

 

I solved it.
After 150k of driving a wear and tear wire connecting the socket to HID somehow sneaked under the headlight housing and caused a short.