First make sure you are accessing the files as
/lib/modules/`uname -r`/... so they refer to the CURRENT kernel you are using.
Second - NEVER manually edit modules.dep - that's a terrible idea.
The only valid way to update the modules.dep (and anything else that requires update) is to run the comment
The first step is to actually install the wl.ko file.
wl.ko driver is NOT part of the fedora kernel. You can install it from rpmfusion as kmod-wl - *IF* they have a package for your kernel. , or you can build it from sources.
Assuming the file is actually installed first test it's there;
ls -l /lib/modules/`uname -r`/extra/wl/wl.ko
or better yet
find /lib/modules/`uname -r` -name wl.ko
If it's there then run "depmod" as root.
Then modprobe or reboot.
---------- Post added at 11:04 PM ---------- Previous post was at 11:03 PM ----------
PS when a new fedora kernel appears it's often a day or two before the rpmfusion repo has driver updates.
So a 'yum update' may fix the problem.