Hi all. Pretty new to this forum stuff. Anyway ivr just had my 172 in to have the camblet water pump and a few sensors changed. All came to over a grand. I picked up the car this morning. Was running better than ever until about 15 minuets into my drive the battery and stop light came on. I lost my steering and the car cut out. I stopped and started again and it was running fine. This all happened a few minuets after I turned the AC on. Any ideas on what it might be? Any help would be appreciated.