I have a recurrent problem. Once a week or less frequently, I go to start the car, and the battery is dead. Battery voltage is at around 8.5 volts. Battery is new. Alternator is putting out about 15 volts. I jumper the car, it starts, and the alternator pumps out about 15vdc, the battery comes up, and I’m fine for another week or two. Anyone have a similar problem?
I have the 2011 QX56 and I've seen something similar. The battery is new. If the headlights (set to auto) are on, I can't start the car. Looks like the battery is not fully charged but it's been charged overnight.
Hello Everyone, I am having an electrical issue. My battery is a year old and the alternator puts out 13.6-13.7v. I am got the battery and alternator tested and they tested good. I am wondering if there is a power draw that is draining the battery. Has anyone found any common problems that cause this that I should look at first? Or does anyone have any experience troubleshooting this issue?
Could not clean enough battery cables be a culprit?
Thanks!
Keyser
I can show pictures but not sure how to post them.
Hello Everyone, I am having an electrical issue. My battery is a year old and the alternator puts out 13.6-13.7v. I am got the battery and alternator tested and they tested good. I am wondering if there is a power draw that is draining the battery. Has anyone found any common problems that cause this that I should look at first? Or does anyone have any experience troubleshooting this issue?
Could not clean enough battery cables be a culprit?
Thanks!
Keyser
I can show pictures but not sure how to post them.
i moved your post here as this thread is going to be what you should read up on and decide if you want to do the simple mod to get full voltage out of the alternator.
