I have an 08 G37 and the new battery I put in it drained in two days.
Im just wondering how do I check if my alternator is bad.

 

use a dvom, or bear arbst tester, vat 40, carbon pile etc etc. or take it to a shop that has the correct equipment to test your charging sys.

 

Probably the alternator AutoZone pep boys check them for free also if you put in standard unsealed battery make sure the cells are filled with distilled water

 

Can it be the battery?
I got it at Walmart.

 

If it died that quick not likely but you can always test battery to see if cells bad

 

If it is the alternator wouldn't have a light in the dash show up?

 

do you have the proper tools or knowledge to check the charging sys or the battery? if not take your vehicle to someone who can properly diagnose the issue you are having. and to answer your question in regards to the battery light in the instrument cluster, "no" it will not necessarily come on when the alternator is not charging.

 

No light for alternator

 

Thanks for all the advice.

 

Use a multimeter



Telcoman

 

http://www.infinitig37.com/TSB/1ST34.pdf Don't know if that is your problem but I had that issue when I had my 08 coupe and the dealer wanted $600 cause I was out of warranty. I just used a bigger battery to solve the problem. 24F

 

A small trick I learned is to turn on your car and unground the battery. If the car dies that means it is relying solely battery aka, he alitnator is bad. If the car remains on then it wil most likely be the battery.

 

A small not a trick is to use a voltmeter to measure the alternator voltage.

Telcoman

 

My car didn't start on the 11th. I took a battery charger and got it to start. I had AAA come over and check it. They said everything was fine, but the battery was showing around 435 CCA might have been CA. They suggested I get the battery replaced in the next six months.

Today I drive the car to work and I park in a narrow spot.I notice it was on the line so I start the car again and center it and turn it off. I notice that the wheel is not straight so I put the car into acc and turn the wheel without starting (didn't want to chance draining the battery.)

I get out tonight and the car won't start. It had enough power to move the seat and unlock. The car was pretty dead, esp when I tried to get it to start at least a couple more times, hoping it would before AAA got there. The guy figured it didn't have enough power to test. It was a hot day today, at least 85 degrees.

My car is a 2011, I believe it was built 12/2010, so I suspect it doesn't have this issue http://www.infinitig37.com/TSB/1ST34.pdf Because that was the earlier model cars.

I am getting a new battery tomorrow. It is a Bosch from Pepboys, it is $104, has a 96 month Pro Rate with 3 year free replacement and 640 cca

Anyone have any thoughts, I saw something about the Bose amp causing a drain.

 

Don't forget to fill cells with distilled water they don't come shipped completely filled