daytime running lights don't work DRL fuse and DRL relay are okay. anysuggestion

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truck was running and daytime running lights were on except for the passenger side which had burned out. When I changed the bulb ( truck still running) the cdaytime running lights stopped working. I have checked the DRL fuse and DRL relay in the fuse panel under the hood. Any other fuse or relay or sensor that would be the issue? Suggestions?