Welcome to the forums. You'll find a lot of useful help on here, but first take your time and type out what your problem is with as much information as possible. Also, and I swear I'm not a grammar Nazi, taking the time to type clearly will increase the odds of someone responding to your post.
Now to your problem, what is the history of your YJ? Did you just buy it or did this just start to happen? Also what have you done so far?