123 electrical problem

I have an 84 300D, in the last few days the Right front low beam and turn signals have gone out several times. I replace the 8A #14 fuse and they started working again. They were out again yesterday I replaced the #14 again and noticed there was a jumper off the number #12 and that wire was loose I don't know what the jumper was for. but now the horn doesn't work and the turn signals are not working again.
TIA