Why would your blinker start blinking really fast and both of the brake lights go out on a 2003 Ford F150 Truck?

i don't know if it is a Ford thing, but my Dodge did somewhat the same thing... my blinker would flash very fast on the dash and it turned out that my bulbs were out in the rear (maybe that is the problem and your brake lights are connected). When the bulbs burn out the circuit is shorted.