My buddy found out that my rear right park light is not working, when i arrived home i checked the light bulb if its burnt out but it is not, instead the front right side marker (small) bulb in the headlamp was burnt out. I change that bulb, but still my rear and front right park light is not working. But when I tested my signal lights they are working properly, together with that side marker bulb. Im wondering why is it that when i didn't switch the signal light, both my signal and side marker light is not working as i turn on my park light switch. any ideas, really need your help to solve this puzzle... thanks in advance...