Navigator headlight
 

The headlight on the driver side has went out again. When i bought the truck the headlight went out and after a few mnths of waiting, the dealer i bought it replaced it and feom my knowledge changed the balast. Welp two mnths later its out again. Arent the hids supposed to last the life of vehicle? Any ideas of why this may be happening? I just dont wanna take it in to the lincoln dealer or drive it 3 hrs to where i bought it for them to tell me its a 1000 replacement.