Davebones

whats up yall im new on here ive got a 91 xj with a few minor issues. Maybe someone can point me in the right direction. Ive got really scratchy speakers but sometimes they work clear as day. Im believing that it has something to do with the antenna... not sure how to access it easily to replace or fix. But worst case scenerio im going to replace 4 speakers and the head unit and give it good sound all around. Ive tried a tape in the tape deck and it plays pretty clearly so it makes me think the antenna is the issue.
Also im a little stuck on replacing my rear wiper motor. Im unsure of how to disconnect the tube to remove the wiper arm. I see the clip to remove the wiper arm but cant seem to get it off without breaking the fluid tube.
Hope someone can guide me in the right direction with these problems i have. Thanks!