Help asap wont start

CivilPenny · 08-02-2020, 12:50 PM

UPDATE 3...we charged the battery up to 12.5v yesterday, then unplugged the negative terminal and let it sit over night until now at 2pm. Read the battery and it was still at 12.3ish, hooked up the cable, and the car started. This in theory should eliminate the battery as the cause, because if it were the battery, it should have depleted greatly by itself over night. This means I have something drawing power while the car is off. I was praying it was just the battery, but now I have to take it in to have it diagnosed. Going to let it sit with terminals hooked up for a few hours and will read it one last time.

Weird, waited a few hours and tested it. Read 12.5 right where we left off...could the problem have solved itself..?

ban25 · 08-02-2020, 05:13 PM

Quote:

Originally Posted by CivilPenny

UPDATE 3...we charged the battery up to 12.5v yesterday, then unplugged the negative terminal and let it sit over night until now at 2pm. Read the battery and it was still at 12.3ish, hooked up the cable, and the car started. This in theory should eliminate the battery as the cause, because if it were the battery, it should have depleted greatly by itself over night. This means I have something drawing power while the car is off. I was praying it was just the battery, but now I have to take it in to have it diagnosed. Going to let it sit with terminals hooked up for a few hours and will read it one last time.

Weird, waited a few hours and tested it. Read 12.5 right where we left off...could the problem have solved itself..?

How old is the battery? If its over 3 years, you should replace it. That will be cheaper than paying a shop to come up with the same diagnosis.

cv129 · 08-02-2020, 07:46 PM

Quote:

Originally Posted by CivilPenny

...could the problem have solved itself..?

First time, you probably didn’t charge it enough.

Now, all you gotta do is drive it and remeasure voltage. If driving the car eats up your battery, then you take it in for diagnosis.

Ghostvette · 08-04-2020, 01:10 PM

Quote:

Originally Posted by CivilPenny

UPDATE 3...we charged the battery up to 12.5v yesterday, then unplugged the negative terminal and let it sit over night until now at 2pm. Read the battery and it was still at 12.3ish, hooked up the cable, and the car started. This in theory should eliminate the battery as the cause, because if it were the battery, it should have depleted greatly by itself over night. This means I have something drawing power while the car is off. I was praying it was just the battery, but now I have to take it in to have it diagnosed. Going to let it sit with terminals hooked up for a few hours and will read it one last time.

Weird, waited a few hours and tested it. Read 12.5 right where we left off...could the problem have solved itself..?

Batteries don't 'fix themselves'. Like Rusty said, if the battery is over 3 years old, you are on borrowed time. Get a new battery, preferably an AGM battery.

08-02-2020, 12:50 PM	#1 (permalink)
CivilPenny Base Member Join Date: Apr 2019 Location: MICHIGAN Posts: 22 Drives: 2012 Nissan 370z 6MT Rep Power: 7	UPDATE 3...we charged the battery up to 12.5v yesterday, then unplugged the negative terminal and let it sit over night until now at 2pm. Read the battery and it was still at 12.3ish, hooked up the cable, and the car started. This in theory should eliminate the battery as the cause, because if it were the battery, it should have depleted greatly by itself over night. This means I have something drawing power while the car is off. I was praying it was just the battery, but now I have to take it in to have it diagnosed. Going to let it sit with terminals hooked up for a few hours and will read it one last time. Weird, waited a few hours and tested it. Read 12.5 right where we left off...could the problem have solved itself..? Last edited by CivilPenny; 08-02-2020 at 02:50 PM.

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