after 2 alternators, three batteries, gear shift, air conditioning compressor and radio/cd replacement i gave up and traded it in. when i traded it in i had just left ford dealership that told me diagnostic found no problems.
i drove it 2 feet when battery light and check charging system light came on. all the way to the chevrolet dealership check charging system light and other dash lights came on. i paid $275 for new battery and diagnostic that showed i had no problems.
i love that car and had paid it off 8 months earlier. i hope and pray i never own a modern mustang again.