my driver side headlight bulb blew out last night so i replaced it with the factory bulb and it was dim as hell but i looked and my drl and my low beam are running on the same power supply i guess so i used a circut tester and my high beam connector has power but my low beam connector doesnt what can cause this my passenger headlight works fine no problem at all low beam and brights work but my driver side dosent could it be a bad ground or what dont know where to start need help please