Remove the 2 wire connector at the master switch and jump it , light goes away the problem is the sensor at the master switch, solution replace brake master cylinder.Light still on , do the same with the switch located in the lower part of the parking brake handle goaes away replace switch, still there inspect wiring for shot, start in the brake light harness, also check the bulbs .
The fuse panel is located below and to the left of the steering wheel by the brake pedal. Ford F-450 – fuse box diagram – passenger compartment. Number. Ampere rating [A] Description. 1. 15. Adjustable pedals. 2. . 205 60 115 31 445 392 416 40

ford s max 2007 fuse box location