Check the terminal connections on your brake switch. I had the same issue and when I checked my connections, the wire came right out of the terminal. Stripped wire and crimped on new terminal and viola, brake lights working again.
Alright guys I’m needing help. I have a 01 gt. The brake lights aren’t working, the 3rd is. I’ve checked fuse 41 it’s working, I’ve checked 33 it’s working. I have power in and out of my brake switch. I’ve checked and changed the multi function switch. It’s working. I have no power to the taillights. But my running lights work and so do my blinker. I’ve struggled finding the cause