NO NO NO It has nothing to do with sockets or any thing like that. I was the first to do the 02-04 swap and the problem your having is the lower part of the 04 tail light is not a sealed unit by itself, but went its installed in the 04 the body and gasket seal it. But the 00-03 body does not fit the tail light correctly so there fore it is very hard to seal the light 100% I played with mine but once and awhile it does fog, not much you can do with it. But it worth it! Cause those tail light make the car!

 

When washing the car.......NEVER spray directly on the headlights...