so ever since I bought this car(07 is250) I've been having weird headlight symptoms. At first my left side light will go off lil' after driving so i took it to the dealer and they changed the bulb for me. A lil after that I changed out the bulbs to garax bulbs. It has been fine for 'lil while and then all of sudden one of the bulb went off again...so I pulled the bulb out and noticed that bottom of the bulb where it connects had a burnt mark along with the connector. Am I having a ballast problems?? oh and also I noticed that the metal piece that holds the bulbs into place is loose or something because when I clip the metal piece back on, the bulbs are still moving around...is this normal? I threw the stock bulbs back in and dropped the car off at the dealer. They had it for 2 days and they still can't find the problem -____-