daylight running lights left light not on

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Dear staff: I BOUGHT A 2004 PATHFINDER CHINOOK NOTICED THE LEFT RUNNING DAYLIGHT NOT GOING ON BUT WHEN TURNING ON LIGHTS THEY ARE WORKING FINE. CHANGED THE BULB AND THE PROBLEM IS STILL THERE. NOTICED ALSO THE RIGHT RUNNING DAYLIGHT SEEMS BRIGHT OR STRONG COMPARED TO WHEN I TURN THE REGULAR LIGHTS ON. ANY IDEA WHAT IS CAUSING IT? HOPE TO HEAR FROM YOU SOON..... THANK YOU.