It’s cold. It’s dark. It’s raining. Your reach down and flip on the fog lights. They help but not that much. So you power up the light bar. Yup! That’s the ticket. The stereo is cranked up and life is ...

That model Ranger does, indeed, have what’s called a variable-voltage or `smart’ alternator. The idea is that when the car’s main battery is fully charged, the alternator reduces its workload to save ...