Why does my battery light come on while driving but once in a while turns off when I turn out my headlights off.
4 Answers
Hi..it sounds like the voltage rectifier is going bad inside your alternator..it used to be that you could change them, but not anymore...i'm a manger at an auto parts store and this is a common problem...changing your battery would probably still have been necessary since your car was running mostly on it. Turning off your headlights just takes the load off the electrical system for a while.
Yeah hes right, you used to be able to buy a set of brushes and a regulator for 20 bucks, now theyre more expensive then the alternators themselves... which motor do you have? i can give you step by step instructions to replace the alt, I also work at a parts store
Mufflerman900 answered 7 years ago
Yeah it sounds like you have a bad alternator like these guys are saying most definitely. Another old rule you can do while the car is running take one of the battery post off if the car stays running the alternator is charging if the car goes dead the alternator is no good that's an old school rule that still stands
I WOULD NEVER use the old school take one battery post off in any car made in the last 20 years. You could fry the computer that way.
