How much does it cost to replace the wiring colunm in the headlights

What is your question?

Honestly I have no clue what is wrong with my car my headlights use to work just fine. One night they wouldn't turn on so I didn't go anywhere, then later they worked then suddenly a week later stopped working completely.so its gotta be a short in my wiring so how much does it cost to replace your whole wire colunm