A SMALL BRAKE FLUID LEAK HAD BEEN NOTICED AROUND A SENSOR ON THE MASTER CYLINDER BUT PROBLEM WAS PUT OFF AS A MINOR PROBLEM. TRUCK WAS SITTING APPROX. 5 MINUTES AFTER DRIVING, AFTER WALKING OUT OF STORE SAW THAT THE TRUCK WAS DRIPPING FLUID THAT WAS ON FIRE FROM THE DRIVERS SIDE UNDER THE HOOD (BRAKE RESERVOIR) WAS ABLE TO PUT FIRE OUT, BUT DID END UP DAMAGING MASTER CYLINDER, POWER DISTRIBUTION BOX, AND ASSORTED WIRES AND HOSES. *TR