running lights/tail lights not working

I just had my TT out for the weekend and although my brake and signal lights work fine, I noticed that when the TV's headlights come on, I don't have any of my top running lights nor tail lights working....I don't usually drive at night anyway and that's why it took awhile to even notice this....Would there be a fuse in the TV?...I checked the panel in the trailer and none seem to be labled as running lights etc....