Since not all vehicles are not the same, I would suggest you check your owner's manual. It should list the relays and what they are for and usually provide a sketch of their location. If your vehicle has a relay for each individual headlamp, switch relays and see if the problem moves. If it does the relay should be replaced.
I forgot to ask if you have the same problem with both hi and low beams. If so ck grounds. if not could be poor connection somewhere or wire chafing.
Last edited by hanky; 01-08-2013 at 08:53 PM.