I have 2002 Acura TL type S. My driver side head light bulb has gone bad.
Got a new one and install it, did not work, checked the fuses and relays ... thay look fine.
Any suggestions what could be the problem?

 

Did you try the left right swap and see if its a bulb or other problem

Did the bulb go pink before quitting? Tahts the normal wear out sign

The remaining parts are the ballast and capacitor- their failure will make sudden stop of light

 

I did try the left right swap and the bulb is good.
what exactally is
ballast and capacitor

Is this the metallic plate located underneath the head light?

 

the metallic plate under the headlight is the ballast..
probably the ballast has gone bad.. that's what happened on one of my headlights..

 

check the Off Topic private sales for one
or the local auto recycler yard should be able to hook you up