i have an 03 v6 and my headlights keep messing up. 2 nights ago my head lights went out i couldnt tell if my tail lights or amber lights went out too i was driving ,but my interior lights still stayed on, and now they dont completetly go out they just dim sometimes i checked my alternator and battery are still good WHAT COULD IT BE? if this helps i did a burn out tonight and they started diming again and when i stoped doing it they whent back to normal but then i took off and they dimmed again

 

From your picture it looks like you have aftermarket foglights. IDK but they're might a problem in the wiring. I bought foglights from atuozone but took them out after they interfered with my regular lights, dimmer sometimes when I turned them on. Try disconnecting them to see if that's the problem. If not then check all the grounds to make sure they're not rusted out. Hope that helps.

 

All of the power to the head and tail lights are ran through the headlight switch. My guess would be that you have a bad headlight switch or wire at that switch.

 

I've had this happen on my 95. Check the ground wire that goes from the neg battery to the front of the body. It may be loose or discolored. Remove the ground wire, clean the body(where it connects on the passenger side) with some sand paper, also scratch the ground connector, should fix your issue. GL