Sliding Rear Window Water Leak

Need some info. Doing some research for a friend, he has a 97 F150 that has this water leak. Has anyone had this problem? I did a search on this forum and did not find any info. I did find a TSB #01-1-11 (I think this is the right number). The water is coming it at the top on the left side near the center window. Last night we pulled the 3rd brake light and ran a bead of silcon. Thanks

The silicon should do the trick...maybe replace the seals around the window aswell. Beyond that i have nothing else to offer without seein it myself.

Good Luck!