98 wrangler power distrabution center problem
 

I have a 98 wrangler with a few problems.I keep blowing the F 19 fuse
in the power distrabution center under the hood cant figure out what it
does dealer wont give me an answer can anyone tell me what this fuse
controls.also trany bangs when I put it in reverse have not changed the
fluid and filter yet any sugg.....