j_romig;
I'm guessing you have a 78 or 79 special or 80 to 84 years. These bikes had 4 fuses, one of which powers the turn signals, horn and brake light. Its a 10 amp fuse with brown wire on both sides of it. The fuse may have blown, or the clips may be badly oxidized causing high resistance. Clips get weak and fall apart.
When you ask questions it best if you state the year and model, otherwise we're just playing guessing games.