Can a bad alternator cause a bad PCM?
Can a bad alternator cause a bad PCM? If these are all good, then you need to check the wiring between the PCM and the alternator, or the PCM itself may have a problem. Another possibility is a bad Battery Temperature Sensor. Can a bad car battery cause an alternator to not charge? In theory a car can run only with the alternator charge, but this can cause heavy voltage spikes and other strange symptoms so this means that a bad car battery can cause an alternator to not charge also. Cars are increasingly coming with modern electronics. What happens...