I rplaced both headlight bulbs because the right side was out. They both came on for a bit and now the right one is out again...When the left is on I hear a humming sound when I put my ear up to the light but on the right there is none..I searched and searched on this site....Which could it be?ballast or igniter I checked the fuses and what not just curious if anybody knows

 

Most likely a ballast but you never know.

 

You may wanna check the fusebox under the hood, when a ballast starts to go bad it can blow the fuse, but even if changing that fuse fixes the problem it wont be long before the ballast will fry out completely.

 

the low buzzing noise is normal when you put your ear close to it.

 

check inverter and grounds. i had this prob and it kept flickering and eventually blew out the inverter (and bulb iirc)

 

where are the grounds that I need to check? fuses besides the ones under the hood? anything else?