battery drain?

Hello,

Here is a diagnostic troubleshooting guide on how to find a parasitic draw in an automotive circuit so that you can fix it, in the diagrams down below. You will need to use a Digital Multi-meter [DMM] to use this guide. here is a guide explaining how to use one below, if needed:

This guide should help

https://www.2carpros.com/articles/car-battery-dead-overnight

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Please go through these guides and get back to us with what you discover.

Thanks,
Alex
2CarPros

i have a 2001 buick lesabre custom. the car suddenly died and would not restart. the battery was dead. bosted it and it restarted only to die again. the next day i tried to boost it again with no luck. a day later i was able to boost it from under the back seat. drove it home and let it run awhile. all lights worked and were bright. turned car off after awhile. it was completely dead. the next day it showed les than 4 volts.

You have a short circuit somewhere or something is still On that's draining the battery overnite-

it might just need a batt.

2001 Buick laSabre 57,000, 3800 V6 engine. the battery is good, alternator is good (14.5V while running). Battery holds charge at 12.5V. The battery will drain down overnight with no apperant reason. Any idea where to start?

[quote:da560d5288="mikew22"]2001 Buick laSabre 57,000, 3800 V6 engine. the battery is good, alternator is good (14.5V while running). Battery holds charge at 12.5V. The battery will drain down overnight with no apperant reason. Any idea where to start?[/quote:da560d5288]

How old is the battery?

Could be a case drain or ( an excessive parasitic drain ) meaning could be a short in the electrical system other than eletronics memory.

if i let my car sit for 3-5 days without using it, the battery goes dead. i have had 2 new batterys in about 2 yrs. if start the car daily or drive it every couple of days i have no problems. i had the car check for electrical problems but they told me everything was ok. my question is , is it ok to put a battery charger on over night even though the car still starts?
thank you

Hi there,

Yes you can do that, but what i would do is get a current draw test done , and make sure that the alternator is checked as a potential current draw via a faulty diode, your mechanic should be able to do this, let me know if they don't.

mark (mhpautos)