brake harness gets hot and melts down. shifter stays lock in park intermitantly. on 2004 Ford Mustang

a 7.5 am fuse in line with the red w green strip wire will burn out, but a 15 am fuse will not. the harness and green with red strip wire to the brake switch harness starts to get hot with the brake switch engaged. is this a common prob. and what is the fix? is there a short in the shift actuator?

Asked by for the 2004 Ford Mustang