I have cab lights that were installed on my 1500 and this week i noticed that one of my lights would go off every now and then, then yesterday when i turned my lights on, they all were off. All the fuses in the fuse box are fine. Other than that i have no idea what would make all of the lights go off on the cab lights since the previous owner of my truck had the installed. The only thing i could think if would be if one of the bulbs went dead that it killed all 5 of them, like christmas tree lights?

If anyone has any ideas as to why they would all go out, it would be appreciated.

Thanks