So my battery light comes on and the car dies. Towed to the local shop diagnosed with a bad alternator. Alternator swapped with a parts store remanufactured unit. 2 days later same thing again. Back to same shop another remanufactured alternator. Shop says pcm is bad. Towed home! Battery voltage is 12.6 with the engine off. Voltage at b+ is 12.6. Voltage at battery with engine running is 12.3 ,and dropping. Number one pin ohms is 2.05 with meter set at 20k. Found three pin connector cracked and grey wire stripped. What do you think...pcm or motorcraft alternator?