My 99 Yukon's DRLs aren't working. Checked the fuses, and bulbs. My brother has the same truck and we were double checking yesterday with his. My headlights work on dim, but on high, the outer bulbs in the assembly goes out, and in daylight there are no DRLs. Parking brake is not set or hung up to keep them off. Is there a relay or something to check? Can't find one. Where would it be located?
Thanks, Blondie