V50-low beam-replaced/no light
 

I received the information light indicating a low beam failure on my 2007 v50. My mechanic replaced the bulb and still no light. He is scratching his head. He has chased the wiring and contends there is nothing wrong with the wiring. He is thinking there is some type of relay that needs to be re-set. We looked for fuses and we see the fuses for the high-beam but nothing for the low beam. Any ideas??thanks