I was cutting my grass last night and turned the head lights on to see and noticed both tail lights were out. All of the dash lights and head lights still work. Earlier in the season I did replace all of the lights with cheap LED bulbs so I thought maybe both of the LED bulbs went bad in the tail lights so I swapped the incandescent bulb back in but it didn't work either. Where should I start? Does it sound like maybe a wire broke? Where does the tail light wires connect into the system? Any other things I could check like a fuse?