I HAVE A 2005 FORD MUSTANG CONVERTABLE 4.0 V-6 ENG , JUST REPLACED THE BCM COMPUTER ( GOT WET FROM BODY LEAK) , AND FUSE BOX , THE CAR RUNS PERFECT, BUT A/C COMPRESSOR WILL NOT TURN ON ?? HAVE CHECKED A/C CLUTCH RELAY AND ALL FUSES RELATED TO THE A/C SYSTEM AND HAVE POWER AT THE CONTROLS BUT STILL CAN NOT GET IT TO TURN ON . DOES THE CAR HAVE TO RUN A CERTAIN AMOUNT OF MILES TO GATHER INFO IN THE BCM TO ACTIVATE CERTAIN FUNCTIONS ? AFTER THE BATTERY HAS BEEN DISCONNECTED- ANYBODY KNOW ANYTHING ABOUT THIS PROBLEM - GOING CRAZY WITH THIS ONE ..

 

The AC system could be very low on refrigerant. You might want to have it checked and look for any leaks.

 

AC will work or not work regardless of miles. It's dependent on refrigerant level and whether or not all of the components are working as they should.