I've replaced the bulb in the truck but it won't work. My navi system is jamming up and won't let me enter a code.

Is there a specific fuse that controls these two items?

One other thing that could cause the problem- my automatic trunk mechanism broke over a year ago. I recently unplugged both ends of that device as I was tired of it just hanging in the trunk. Would two open ends cause problems?

Thanks in advance!