I'm having a problem with my driver's side headlight. With everything turned off, the headlight remains lit...Already replaced fuse, battery, alternator..What else could be the problem??? I'm thinking regulator switch...

 

hmm.. could be the wireing

 

I'll bet there's a short or a crossed wire somewhere... trace the wire all the way to the relay and see if you find any rust or breaks or (heaven forbid) melted wires