I have an 07 g35 coupe i got into a small accident and had to replace the front bumper the side fender and one head light. I actually replace both head with after market ones since it was cheaper for two the for one OEM headlight. Well i changed it everything worked even the halo around the lights, two weeks later i notice the halo stoped working i didnt pay much attention to it. Now the tail light dont work unless i hit the breaks, inside of the car the only light that turn in is the speedometer, gas, rpms meter, and temp, when i turn on the AC it does work but not the clock or the buttons for the radio or AC.. I checked all fuses inside the car and by the battery... What now ?

Take it to a technician. Ur problem seems too intricate to DIY

Sounds like a ground issue to me. You did the work yourself so did you make sure that you returned all of the grounds to their normal attachment point. It really sounds like either a ground(s) have come loose or there is something causing additional resistance that was not there before. Start with that headlight you noticed and see if you can resolve that first, then on to the other items if needed. And if you painted any parts before re-attaching them, did you remove the paint from the ground wire areas first? Good luck.

Why do people like you even bother to answer a technical question?

[/giggle]