I have a 2002 Lincoln Continental that shut off while I was driving on the freeway. It was 97 degrees, late afternoon and I had been driving for about 25 miles when the AC shut off. Next the CD player went out and finally the dash lighting. Power steering was next. I was able to exit the freeway and park. The mechanic went out the next day and it started right up. I drove it the next day, approximately 15 miles and it shut down again. Alternator tested good as did the battery. Any help would be appreciated.