What else could be wrong with the brake light..

Multifunction switch!!!... The brake light circuit passes through this (signal light) switch before it goes to the brake lights, it's not making it through!!!... It's not for the average Diy'er... Special tools and skill needed!!... IF it were the brake light switch or a fuse, you couldn't shift from park!!!!... Since the signal lights still work......wiring and bulbs are ok!!!