So I just replaced my passenger side headlight, which worked on bright and dim before I replaced it. Two replacement headlights later, it will only work on bright. So I have only one headlight on the dim setting, which means I have to drive around with my brights on or have a headlight out. Neither of which the cops around here like. Anybody have any idea what would cause this?

 

Sounds like it may be a bad ground, but you might want to check that you're getting voltage at the headlight connector. I'd also install a relay-based upgrade harness if you have not already done so.

http://www.ebay.com/itm/330997592807

 

Just replaced my headlight and after the replacement the new light was real dim , the ground at the headlight connection was broke . Just replaced the connector with one from local auto store , works fine now .