GEM MODULE/ECU FAILED - COROSION FOUND ON BA BOX FUSE ASSEMBLY - PROGRESSIVE AND RANDON SYMTOMS OVER PERIOD OF TIME PRIOR TO COMPLETE FAILURE - FORD LOOKED AT PROBLEMS PREVIOUSLY AND NEVER CORRECTED(REPLACED BATERY WORN OUT FROM REPEATED DRAINS). CAUSED ELECTRICAL BACKFLOWS INTO VARIOUS SYSTEMS WHEN POWER OFF SUCH AS AC, RADIO, ENGINE ETC... DRAINING BATTERY NUMEROUS TIMES AND CAUSING A POTENTIAL FIRE HAZARD.... CAUSED AIRBAGS TO BECOME DISABLED... COMPROMISED ABS BRAKING RANDOMLY... THESE SYSMPTOMS OCCURRED MANY MONTHS PRIOR TO TOTAL FAILURE AT WHICH TIME MANY REALLY WEIRD SYSMPTOMS MADE THE CAR VIRTUALLY UNDRIVEABLE AT SPEED... TRANSMISSION CHANGING GEARS ERRADICALLY... SPEEDOMETER WORKS OFF AND ON... ENGINE CYCLE THRU STARTUP CYCLE OVER AND OVER WHILE DRIVING. *AK