Low beam head lights don't work

Hi guys, A friend of mine asked me today if I knew why his low beams don't work on his 98 Tahoe, His day time running lights work fine but when he turns his head lights on the low beams go off, the high beams work fine, he tried replacing the headlight switch but that didn't cure the problem and all the fuses are good????
Anyone have a solution??
Thanks in advance,
Levi

Hi guys, A friend of mine asked me today if I knew why his low beams don't work on his 98 Tahoe, His day time running lights work fine but when he turns his head lights on the low beams go off, the high beams work fine, he tried replacing the headlight switch but that didn't cure the problem and all the fuses are good????
Anyone have a solution??
Thanks in advance,
Levi
dumb question, but did he replace the bulb?

dumb question, but did he replace the bulb?


Correct me if I'm wrong but isn't the low beam bulbs also the same bulbs used as the daytime running lights??
The DRLs work but go out when the headlight switch is turned on.

http://www.automotiveforums.com/vbulletin/showthread.php?t=430891

Read the reply by maintainin76, you may have the same problem