2007 tracker beacon lights

Good morning, I tell you that today dawn with which a light from the front headlights of my truck did not turn on, but when putting the upper ones if I turned on, check the lighthouse but I see a single focus so I would like to know if it could be a problem of fuses or I have to change the focus of the lighthouse.

Excuse me if it is an obvious question but it has not happened to me before.

Thank you very much for your assistance,

Friend Alfonso. If your lighthouse has only one focus for the lights short and long then it has two filaments and most likely one of them is melted and the focus must be changed

Thank you very much for your answer friend, with this I go to the safe,

greetings.