- My Forums
- Tiger Rant
- LSU Recruiting
- SEC Rant
- Saints Talk
- Pelicans Talk
- More Sports Board
- Fantasy Sports
- Golf Board
- Soccer Board
- O-T Lounge
- Tech Board
- Home/Garden Board
- Outdoor Board
- Health/Fitness Board
- Movie/TV Board
- Book Board
- Music Board
- Political Talk
- Money Talk
- Fark Board
- Gaming Board
- Travel Board
- Food/Drink Board
- Ticket Exchange
- TD Help Board
Customize My Forums- View All Forums
- Show Left Links
- Topic Sort Options
- Trending Topics
- Recent Topics
- Active Topics
Started By
Message
Bad battery vs. Bad alternator
Posted on 12/1/23 at 11:55 am
Posted on 12/1/23 at 11:55 am
Car got jumped this morning and again at lunch. I let it run for about 45 minutes in the AM after jumping. About to take it to Autozone since I got the battery in April 2022.
What would confirm that it's the alternator and not the battery?
What would confirm that it's the alternator and not the battery?
6
Posted on 12/1/23 at 12:02 pm to BilbeauTBaggins
if you jumped it and ran for 45 minutes its not the alternator. If you have a multimeter you can test the battery yourself.
Posted on 12/1/23 at 12:17 pm to BilbeauTBaggins
Odds are it's the battery because batteries fail at a much higher rate then alternators. It's where I would start. Guess you will know once you get it load tested.
Posted on 12/1/23 at 12:26 pm to BilbeauTBaggins
You need to put a meter on the battery when the vehicle is running. Should be at or above 13 volts and less than 15.
Posted on 12/1/23 at 12:47 pm to LEASTBAY
Took it to Autozone. Told them it's been running for almost an hour without any changes and they went ahead and swapped since it's still within warranty time frame. Didn't even have to check if it was the alternator.
Posted on 12/1/23 at 12:58 pm to BilbeauTBaggins
quote:
What would confirm that it's the alternator and not the battery?
Bad batteries can kill alternators and vice-versa. A load tester and a DVOM will tell you what is wrong. It's a series of tests though, battery voltage under load, alternator supplied voltage/current under load and at idle and fast idle conditions, etc. An alternator can test fine while idling then be unable to adequately supply current while driving, which would cause the problem you are having.
Posted on 12/1/23 at 1:55 pm to BilbeauTBaggins
alternator would mean your car wont run at all after a jump start. If you jump it and it runs fine until you turn it off, bad battery.
Posted on 12/3/23 at 8:57 pm to BilbeauTBaggins
The sure fire way to tell if it’s your alternator is take a voltage reading on the battery while it’s running. If it reads less than 13 volts then your alternator is bad
Page 1 of 1
Popular
Back to top
Follow TigerDroppings for LSU Football News