Jerry,
Like Joe noted, the awning mount is notorious for leaking. Leaks can occur at the rivets or along seam where the awning abuts to the coach side. Lexel is a good sealant for these areas. You can also use Gorilla tape to temporarily seal the suspected area. However, you risk taking paint off with the tape when you remove it. Another area to check is screws under the vinyl strip at the side wall to roof joint. If any of the screws heads are rusty, water is getting to them and leaks can occur. Again, Lexel is a good sealant. If the vinyl is hard and cracked, you can get it at CW, BCS, or Amazon.
Good luck, Steve