I had my alternator replaced a few days ago as it was bad(brake and battery light flashing) and now the ac compressor will not turn on. Of course the shop is not taking any responsibility for this. They have done a pressure test and looks good. They have tried to troubleshoot via electrical diag tests and have found nothing so they are leaning toward the PCM being bad. Does this sound correct as I am having no other issues with the car except the AC.
Thanks