Help with battery problem

D370z

Hi guys, I have a problem with the battery. For some reason after I shut off everything the car the lights, the battery dies overnight or in a couple hours, for some reason the car is consuming electric while its all off, I tried to replaced the battery twice its not the battery.

Any info or suggestions let me know thanks for your time!

Car info 2009 Nissan 370z 33k miles.

TreeSemdyZee

Have you installed any aftermarket electronics i.e. Stereo, lights?

D370z

No i did not everything is stock.

diddy535

Any CELs coming on? Any idea what the volt meter is saying when the car is on? Based on that number you can narrow it down to or rule out the alternator which is a likely culprit.

Some people have "double tapped" the start/stop button, leaving the car in accessory mode by mistake.

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SouthArk370Z

Is the alternator putting out enough juice? Check the voltmeter on the top of the dash - should be reading at least 14 volts. Doesn't guarantee the alternator is OK, but it's a good sign if 15 volts or so.
Some auto parts stores will still check your alternator and battery for free. Grab the Yellow Pages and start calling.

Check the fuses and fusible links immediately next to the battery terminal. Use an ohmmeter or voltmeter; don't trust your eyes.

As per TreeSemdyZee, have you added anything electrically powered that is not turning off?

Check the water level in the battery. Add distilled water as needed.

Check battery connections and grounds for corrosion.

That's all I can think of right now. Good luck.

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Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

FairladyZ

This, could be bad alternator not charging the battery while its running.

D370z

Alternator is giving between 14 and 16, the battery replaced two times, the car is not being forgotten in ACC mode, Ill check some fuses today.

Any specific fuses that might be connected with this that would be a good idea to check?


Thanks for help to all much appreciated.

DEpointfive0

Hmmmmmm... Seems like you're shorting something somewhere... And with a high draw, because even if I leave a map light on for a few hours or even overnight, my car will still start, and I'm on the 3 year old OEM battery...

Did you buy the car used? Or, sorry to state it like this because it's a bit personal, but are you a "high risk" loan customer? Sometimes if your car was used, or you are a "high risk" customer the previous owner or dealership or loan company will request to have a GPS tracker installed which could be drawing power.


(My last car, a 2009 Maxima, was a rental car and it had a GPS tracker/remote locking device)

D370z

I bought the car used yes, where would the gps tracker be located if a loan company had it?

SouthArk370Z

Look through the FSMs (available on this site at Nissan 370Z Owners Manual / Service Manuals - Nissan 370Z Forum), especially the PG (Power Supply & Ground) section. The fuse/fusible link box I was referring to is shown on page PG-85.

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Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

SouthArk370Z

One other thing to check: battery voltage when car is turned off. Should read ~13.2V immediately after killing the engine.
Let sit for a few hours and take another voltage reading. If it reads below about 12.3V (~75% charged), then the battery has a problem, you have a drain somewhere, or you are not charging.

__________________
Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

DEpointfive0

Might want to go to the dealershit to see if your car has loose wiring anywhere

DR_

There are several videos on youtube that show you how to test for parasitic loss.
Automotive Repair: Locating Battery Drain Using Voltage Drop - YouTube

D370z

Thanks for reply!
when the car is off there is no noises no lights on, nothing i even locked the car stayed in couple minutes maybe it does something while its locked, nothing happened.

where do i get a ammeter?
Which fuses do i check for any unusual power draw?
thanks for help!

redline727

I don't know the details of the Nissan "comfort access keys" but by any chance do you park in a garage and leave the key in the car? I ask this bc the car has to know when the key is in range so you can lock/unlock/start the car. If you leave the key in the car or in range it can cause the car to constantly recognize the key and be a draw on the battery.

Now I can't say for sure this is true for Nissan but I have seen this at work with BMW comfort access systems and when the key is left in the car it never goes into sleep mode. But batteries on BMW's are wired into many systems and even have to be programmed in newer BMW's so what I'm talking about may not mean anything on our cars but its worth a look. Always start with the easiest most inexpensive things first before you start spending any serious money.

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