As far as PCM or BCM failure is concerned: Don't Ford's late model system designs provide a "limp home" feature as regards to (most) control module failures?
I've had brake cylinder and master cylinder failures in the past and none have left me completely dead in the water. I do carry along a can of brake fluid.
We just had our first ever dead RV chassis battery occurance during an excursion in Oregon. The V10 would not even budge (I had left the headlights on). I merely pushed the battery boost solenoid rocker switch on the dash and the engine fired right up. In case the coach battteries would have also been too dead to do the boost, I also have onboard two other independent systems that would have made possible eventual starting of the main engine.
FWIW, in case something does leave us dead in the water, I permanently mounted on our motorhome's roof a celllular band antenna feeding a 12 volt cellular band booster preamplifier inside that allows our cell phones to receive and transmit in dead zones where only one, and sometimes no, signal strength bar is showing on the phones.
