Headlights problems of the 2005 Hyundai Elantra

Headlight burnt out on 2005 Hyundai Elantra. Took it to get fixed at a car repair store. Car repair store said wiring was melted to headlight, he had never seen anything like this before and felt it was a fire hazard. We had to take it to the dealer to fix the headlight. Service department at the dealer personally told me that there were burnt ends of wiring on the headlight as well as exposed wires. They told us that it is due to normal wear and tear and we had to pay $136. 05 to have it fixed. They replaced the bulb and new ends at the headlight connector. I saved the old bulb and wiring because I feel that this may have been a factory or manufacturers defect that could be potentially dangerous and if left unfixed cause a fire. I do not feel that consumers should have to pay to fix car parts that were not installed or designed correctly in the first place. Dealership said that it was 'weird' and they had no idea how it happened but refused to admit that it could have been a factory/manufacturer problem. I spoke with both the service dept. Manager and the dealership manager. The part was just recently replaced so we do not know if it will occur again.

With the a/c on the headlights will dim briefly at different times just for a moment. A couple of times the have gone all the way out briefly. The lights will dim enough that people think I'm flashing my lights at them. This problem only occurs with the a/c on, the cause of the problem is when the a/c compressor cuts on it takes a lot of voltage to turn it on, and the headlights dim briefly. Depending on the weather this problem can happen every half mile. This problem has been on going. Took the car to the dealer, and the said every thing checks out ok, its just the nature of this brand of car.