Car draining NEW battery on ignition suddenly

Tiny
JACKIE PRAHL
  • MEMBER
  • 2006 PONTIAC G6
  • 3.5L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 111,500 MILES
Ok so I stopped for 45 min to visit my parents. Went to leave tried to turn over the car it began to crank then all power shut off! The starter over cranked a bit but then all power cut out. The battery was so drained that nothing worked. The car remote would not even register. No power to radio or anything at all. Jumped the car battery and tested it, it was low but running. So I went to the store to have them test it. Car would not start again, Same symptoms. Replaced battery (love warranties from 2 months ago) started little extra crank, ran fine for a 30 minute drive. Now its parked home just wont start. Any ideas on what it could be?
Tuesday, March 28th, 2017 AT 9:46 PM

6 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Try a security system reset more than likely form battery going dead. see link.
https://www.2carpros.com/articles/how-to-reset-a-security-system
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Wednesday, March 29th, 2017 AT 6:47 AM
Tiny
STEVE W.
  • MECHANIC
  • 15,233 POSTS
Am I correct in thinking you had a new battery installed 2 months ago and it went dead? Then you had a replacement installed and now it's dead as well? If that's the case you need to determine what is draining the battery that fast. That would take a parasitic draw test.
First you need a multimeter and know how to use it to read millivolts.
https://www.2carpros.com/articles/how-to-use-a-voltmeter

Now visit Charles at https://www.youtube.com/watch?v=lRcj1fQcWwU
Download the fuse charts and follow his method and you should find the culprit.
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Friday, March 31st, 2017 AT 3:50 PM
Tiny
JACKIE PRAHL
  • MEMBER
  • 3 POSTS
Nothing is drawing from the battery unless its being turned over. That is when this is happening. Security system reset didnt help
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Friday, March 31st, 2017 AT 5:17 PM
Tiny
CARADIODOC
  • MECHANIC
  • 34,330 POSTS
Hi guys. Sounds to me like this isn't a battery problem.

Follow the smaller battery positive wire to the under-hood fuse box. Be sure that connection is clean and tight.

If that isn't the cause, have the charging system professionally tested by a mechanic, not at an auto parts store. Specifically, I want to see what they find for "full-load output current" and "ripple voltage".
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Friday, March 31st, 2017 AT 5:41 PM
Tiny
JACKIE PRAHL
  • MEMBER
  • 3 POSTS
We are talking about bringing it in to have it diagnosed. We have had disapearing electrical issues since we got it in 08.
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Saturday, April 1st, 2017 AT 12:17 PM
Tiny
CARADIODOC
  • MECHANIC
  • 34,330 POSTS
Tightening the connection I mentioned takes the better part of ten seconds once the hood is opened. This is a real common problem on every car brand.
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Saturday, April 1st, 2017 AT 3:39 PM

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