Hi I recently purchased a 2008 XC120 for my son and the gentlemen said that it only need a headlight bulb. So I get it home and after a few days I notice that the taillight was also out. At this point I had only purchased the new headlight bulb. So I changed that and it doesn't work. Does anyone know if I have to change the headlight? Also, if the headlight isn't working does that make the taillight go out as well? Or is it maybe theres just electrical stuff going on? I have no clue and any suggestions would be helpful. Thanks!